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Date: Fri, 20 Aug 2010 22:42:24 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Ian Campbell <ijc@...lion.org.uk>, linux-kernel@...r.kernel.org,
stable@...nel.org, stable-review@...nel.org,
akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
Greg KH <gregkh@...e.de>
Subject: Re: [2/3] mm: fix up some user-visible effects of the stack guard
page
On Fri, 2010-08-20 at 12:43 -0700, Linus Torvalds wrote:
> Yeah, no. It looks like adding a "vm_prev" and doing a regular doubly
> linked list thing wouldn't be too bad. But switching over to the
> list.h version looks like a nightmare.
>
> Too bad.
You mean something like the below?
Should I look at refreshing that thing (yes, that's a 2007 patch)?
---
Subject: mm: replace vm_next with a list_head
Date: 19 Jul 2007
Replace the vma list with a proper list_head.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
---
arch/alpha/kernel/osf_sys.c | 2
arch/arm/mm/mmap.c | 2
arch/frv/mm/elf-fdpic.c | 4 -
arch/i386/mm/hugetlbpage.c | 2
arch/ia64/kernel/sys_ia64.c | 2
arch/ia64/mm/hugetlbpage.c | 2
arch/mips/kernel/irixelf.c | 20 +++---
arch/mips/kernel/syscall.c | 2
arch/parisc/kernel/sys_parisc.c | 4 -
arch/powerpc/mm/tlb_32.c | 2
arch/ppc/mm/tlb.c | 2
arch/sh/kernel/sys_sh.c | 2
arch/sh/mm/cache-sh4.c | 2
arch/sh64/kernel/sys_sh64.c | 2
arch/sparc/kernel/sys_sparc.c | 2
arch/sparc64/kernel/binfmt_aout32.c | 2
arch/sparc64/kernel/sys_sparc.c | 2
arch/sparc64/mm/hugetlbpage.c | 2
arch/um/kernel/skas/tlb.c | 6 -
arch/x86_64/ia32/ia32_aout.c | 2
arch/x86_64/kernel/sys_x86_64.c | 2
drivers/char/mem.c | 2
drivers/oprofile/buffer_sync.c | 4 -
fs/binfmt_aout.c | 2
fs/binfmt_elf.c | 6 -
fs/binfmt_elf_fdpic.c | 4 -
fs/hugetlbfs/inode.c | 2
fs/proc/task_mmu.c | 18 ++---
include/linux/init_task.h | 1
include/linux/mm.h | 44 +++++++++++++-
include/linux/sched.h | 2
ipc/shm.c | 4 -
kernel/acct.c | 5 -
kernel/auditsc.c | 4 -
kernel/fork.c | 12 +--
mm/madvise.c | 2
mm/memory.c | 20 +++---
mm/mempolicy.c | 10 +--
mm/migrate.c | 2
mm/mlock.c | 4 -
mm/mmap.c | 112 +++++++++++++++++-------------------
mm/mprotect.c | 2
mm/mremap.c | 7 +-
mm/msync.c | 2
mm/swapfile.c | 2
45 files changed, 186 insertions(+), 155 deletions(-)
Index: linux-2.6/arch/i386/mm/hugetlbpage.c
===================================================================
--- linux-2.6.orig/arch/i386/mm/hugetlbpage.c
+++ linux-2.6/arch/i386/mm/hugetlbpage.c
@@ -241,7 +241,7 @@ static unsigned long hugetlb_get_unmappe
full_search:
addr = ALIGN(start_addr, HPAGE_SIZE);
- for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+ for (vma = find_vma(mm, addr); ; vma = vma_next(vma)) {
/* At this point: (!vma || addr < vma->vm_end). */
if (TASK_SIZE - len < addr) {
/*
Index: linux-2.6/arch/x86_64/kernel/sys_x86_64.c
===================================================================
--- linux-2.6.orig/arch/x86_64/kernel/sys_x86_64.c
+++ linux-2.6/arch/x86_64/kernel/sys_x86_64.c
@@ -118,7 +118,7 @@ arch_get_unmapped_area(struct file *filp
start_addr = addr;
full_search:
- for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+ for (vma = find_vma(mm, addr); ; vma = vma_next(vma)) {
/* At this point: (!vma || addr < vma->vm_end). */
if (end - len < addr) {
/*
Index: linux-2.6/drivers/char/mem.c
===================================================================
--- linux-2.6.orig/drivers/char/mem.c
+++ linux-2.6/drivers/char/mem.c
@@ -633,7 +633,7 @@ static inline size_t read_zero_pagealign
down_read(&mm->mmap_sem);
/* For private mappings, just map in zero pages. */
- for (vma = find_vma(mm, addr); vma; vma = vma->vm_next) {
+ for (vma = find_vma(mm, addr); vma; vma = vma_next(vma)) {
unsigned long count;
if (vma->vm_start > addr || (vma->vm_flags & VM_WRITE) == 0)
Index: linux-2.6/drivers/oprofile/buffer_sync.c
===================================================================
--- linux-2.6.orig/drivers/oprofile/buffer_sync.c
+++ linux-2.6/drivers/oprofile/buffer_sync.c
@@ -216,7 +216,7 @@ static unsigned long get_exec_dcookie(st
if (!mm)
goto out;
- for (vma = mm->mmap; vma; vma = vma->vm_next) {
+ list_for_each_entry(vma, &mm->mm_vmas, vm_list) {
if (!vma->vm_file)
continue;
if (!(vma->vm_flags & VM_EXECUTABLE))
@@ -241,7 +241,7 @@ static unsigned long lookup_dcookie(stru
unsigned long cookie = NO_COOKIE;
struct vm_area_struct * vma;
- for (vma = find_vma(mm, addr); vma; vma = vma->vm_next) {
+ for (vma = find_vma(mm, addr); vma; vma = vma_next(vma)) {
if (addr < vma->vm_start || addr >= vma->vm_end)
continue;
Index: linux-2.6/fs/binfmt_elf.c
===================================================================
--- linux-2.6.orig/fs/binfmt_elf.c
+++ linux-2.6/fs/binfmt_elf.c
@@ -780,7 +780,7 @@ static int load_elf_binary(struct linux_
current->mm->start_data = 0;
current->mm->end_data = 0;
current->mm->end_code = 0;
- current->mm->mmap = NULL;
+ INIT_LIST_HEAD(¤t->mm->mm_vmas);
current->flags &= ~PF_FORKNOEXEC;
current->mm->def_flags = def_flags;
@@ -1444,7 +1444,7 @@ static int elf_dump_thread_status(long s
static struct vm_area_struct *first_vma(struct task_struct *tsk,
struct vm_area_struct *gate_vma)
{
- struct vm_area_struct *ret = tsk->mm->mmap;
+ struct vm_area_struct *ret = __vma_next(&tsk->mm->mm_vmas, NULL);
if (ret)
return ret;
@@ -1459,7 +1459,7 @@ static struct vm_area_struct *next_vma(s
{
struct vm_area_struct *ret;
- ret = this_vma->vm_next;
+ ret = vma_next(this_vma);
if (ret)
return ret;
if (this_vma == gate_vma)
Index: linux-2.6/fs/binfmt_elf_fdpic.c
===================================================================
--- linux-2.6.orig/fs/binfmt_elf_fdpic.c
+++ linux-2.6/fs/binfmt_elf_fdpic.c
@@ -1461,7 +1461,7 @@ static int elf_fdpic_dump_segments(struc
{
struct vm_area_struct *vma;
- for (vma = current->mm->mmap; vma; vma = vma->vm_next) {
+ list_for_each_entry(vma, ¤t->mm->mm_vmas, vm_list) {
unsigned long addr;
if (!maydump(vma))
@@ -1710,7 +1710,7 @@ static int elf_fdpic_core_dump(long sign
/* write program headers for segments dump */
for (
#ifdef CONFIG_MMU
- vma = current->mm->mmap; vma; vma = vma->vm_next
+ vma = __vma_next(¤t->mm->mm_vmas, NULL); vma; vma_next(vma)
#else
vml = current->mm->context.vmlist; vml; vml = vml->next
#endif
Index: linux-2.6/fs/hugetlbfs/inode.c
===================================================================
--- linux-2.6.orig/fs/hugetlbfs/inode.c
+++ linux-2.6/fs/hugetlbfs/inode.c
@@ -135,7 +135,7 @@ hugetlb_get_unmapped_area(struct file *f
full_search:
addr = ALIGN(start_addr, HPAGE_SIZE);
- for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+ for (vma = find_vma(mm, addr); ; vma = vma_next(vma)) {
/* At this point: (!vma || addr < vma->vm_end). */
if (TASK_SIZE - len < addr) {
/*
Index: linux-2.6/fs/proc/task_mmu.c
===================================================================
--- linux-2.6.orig/fs/proc/task_mmu.c
+++ linux-2.6/fs/proc/task_mmu.c
@@ -87,11 +87,11 @@ int proc_exe_link(struct inode *inode, s
goto out;
down_read(&mm->mmap_sem);
- vma = mm->mmap;
+ vma = __vma_next(&mm->mm_vmas, NULL);
while (vma) {
if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file)
break;
- vma = vma->vm_next;
+ vma = vma_next(vma);
}
if (vma) {
@@ -364,7 +364,7 @@ void clear_refs_smap(struct mm_struct *m
struct vm_area_struct *vma;
down_read(&mm->mmap_sem);
- for (vma = mm->mmap; vma; vma = vma->vm_next)
+ list_for_each_entry(vma, &mm->mm_vmas, vm_list)
if (vma->vm_mm && !is_vm_hugetlb_page(vma))
walk_page_range(vma, clear_refs_pte_range, NULL);
flush_tlb_mm(mm);
@@ -406,7 +406,7 @@ static void *m_start(struct seq_file *m,
/* Start with last addr hint */
if (last_addr && (vma = find_vma(mm, last_addr))) {
- vma = vma->vm_next;
+ vma = vma_next(vma);
goto out;
}
@@ -416,9 +416,9 @@ static void *m_start(struct seq_file *m,
*/
vma = NULL;
if ((unsigned long)l < mm->map_count) {
- vma = mm->mmap;
+ vma = __vma_next(&mm->mm_vmas, NULL);
while (l-- && vma)
- vma = vma->vm_next;
+ vma = vma_next(vma);
goto out;
}
@@ -448,12 +448,12 @@ static void vma_stop(struct proc_maps_pr
static void *m_next(struct seq_file *m, void *v, loff_t *pos)
{
struct proc_maps_private *priv = m->private;
- struct vm_area_struct *vma = v;
+ struct vm_area_struct *vma = v, *next;
struct vm_area_struct *tail_vma = priv->tail_vma;
(*pos)++;
- if (vma && (vma != tail_vma) && vma->vm_next)
- return vma->vm_next;
+ if (vma && (vma != tail_vma) && (next = vma_next(vma)))
+ return next;
vma_stop(priv, vma);
return (vma != tail_vma)? tail_vma: NULL;
}
Index: linux-2.6/ipc/shm.c
===================================================================
--- linux-2.6.orig/ipc/shm.c
+++ linux-2.6/ipc/shm.c
@@ -1034,7 +1034,7 @@ asmlinkage long sys_shmdt(char __user *s
vma = find_vma(mm, addr);
while (vma) {
- next = vma->vm_next;
+ next = vma_next(vma);
/*
* Check if the starting address would match, i.e. it's
@@ -1067,7 +1067,7 @@ asmlinkage long sys_shmdt(char __user *s
*/
size = PAGE_ALIGN(size);
while (vma && (loff_t)(vma->vm_end - addr) <= size) {
- next = vma->vm_next;
+ next = vma_next(vma);
/* finding a matching vma now does not alter retval */
if ((vma->vm_ops == &shm_vm_ops) &&
Index: linux-2.6/kernel/acct.c
===================================================================
--- linux-2.6.orig/kernel/acct.c
+++ linux-2.6/kernel/acct.c
@@ -540,11 +540,8 @@ void acct_collect(long exitcode, int gro
if (group_dead && current->mm) {
struct vm_area_struct *vma;
down_read(¤t->mm->mmap_sem);
- vma = current->mm->mmap;
- while (vma) {
+ list_for_each_entry(vma, ¤t->mm->mm_vmas, vm_list)
vsize += vma->vm_end - vma->vm_start;
- vma = vma->vm_next;
- }
up_read(¤t->mm->mmap_sem);
}
Index: linux-2.6/kernel/auditsc.c
===================================================================
--- linux-2.6.orig/kernel/auditsc.c
+++ linux-2.6/kernel/auditsc.c
@@ -795,8 +795,7 @@ static void audit_log_task_info(struct a
if (mm) {
down_read(&mm->mmap_sem);
- vma = mm->mmap;
- while (vma) {
+ list_for_each_entry(vma, &mm->mm_vmas, vm_list) {
if ((vma->vm_flags & VM_EXECUTABLE) &&
vma->vm_file) {
audit_log_d_path(ab, "exe=",
@@ -804,7 +803,6 @@ static void audit_log_task_info(struct a
vma->vm_file->f_path.mnt);
break;
}
- vma = vma->vm_next;
}
up_read(&mm->mmap_sem);
}
Index: linux-2.6/mm/madvise.c
===================================================================
--- linux-2.6.orig/mm/madvise.c
+++ linux-2.6/mm/madvise.c
@@ -349,7 +349,7 @@ asmlinkage long sys_madvise(unsigned lon
if (start >= end)
goto out;
if (prev)
- vma = prev->vm_next;
+ vma = vma_next(prev);
else /* madvise_remove dropped mmap_sem */
vma = find_vma(current->mm, start);
}
Index: linux-2.6/mm/memory.c
===================================================================
--- linux-2.6.orig/mm/memory.c
+++ linux-2.6/mm/memory.c
@@ -266,11 +266,12 @@ void free_pgd_range(struct mmu_gather **
flush_tlb_pgtables((*tlb)->mm, start, end);
}
-void free_pgtables(struct mmu_gather **tlb, struct vm_area_struct *vma,
+void free_pgtables(struct mmu_gather **tlb, struct list_head *vmas,
+ struct vm_area_struct *vma,
unsigned long floor, unsigned long ceiling)
{
while (vma) {
- struct vm_area_struct *next = vma->vm_next;
+ struct vm_area_struct *next = __vma_next(vmas, vma);
unsigned long addr = vma->vm_start;
/*
@@ -289,7 +290,7 @@ void free_pgtables(struct mmu_gather **t
while (next && next->vm_start <= vma->vm_end + PMD_SIZE
&& !is_vm_hugetlb_page(next)) {
vma = next;
- next = vma->vm_next;
+ next = __vma_next(vmas, vma);
anon_vma_unlink(vma);
unlink_file_vma(vma);
}
@@ -808,7 +809,7 @@ static unsigned long unmap_page_range(st
* ensure that any thus-far unmapped pages are flushed before unmap_vmas()
* drops the lock and schedules.
*/
-unsigned long unmap_vmas(struct mmu_gather **tlbp,
+unsigned long unmap_vmas(struct mmu_gather **tlbp, struct list_head *vmas,
struct vm_area_struct *vma, unsigned long start_addr,
unsigned long end_addr, unsigned long *nr_accounted,
struct zap_details *details)
@@ -820,7 +821,7 @@ unsigned long unmap_vmas(struct mmu_gath
spinlock_t *i_mmap_lock = details? details->i_mmap_lock: NULL;
int fullmm = (*tlbp)->fullmm;
- for ( ; vma && vma->vm_start < end_addr; vma = vma->vm_next) {
+ for (; vma && vma->vm_start < end_addr; vma = __vma_next(vmas, vma)) {
unsigned long end;
start = max(vma->vm_start, start_addr);
@@ -891,7 +892,8 @@ unsigned long zap_page_range(struct vm_a
lru_add_drain();
tlb = tlb_gather_mmu(mm, 0);
update_hiwater_rss(mm);
- end = unmap_vmas(&tlb, vma, address, end, &nr_accounted, details);
+ end = unmap_vmas(&tlb, &vma->vm_mm->mm_vmas, vma,
+ address, end, &nr_accounted, details);
if (tlb)
tlb_finish_mmu(tlb, address, end);
return end;
@@ -2069,7 +2071,7 @@ int vmtruncate_range(struct inode *inode
void swapin_readahead(swp_entry_t entry, unsigned long addr,struct vm_area_struct *vma)
{
#ifdef CONFIG_NUMA
- struct vm_area_struct *next_vma = vma ? vma->vm_next : NULL;
+ struct vm_area_struct *next_vma = vma ? vma_next(vma) : NULL;
#endif
int i, num;
struct page *new_page;
@@ -2096,14 +2098,14 @@ void swapin_readahead(swp_entry_t entry,
if (vma) {
if (addr >= vma->vm_end) {
vma = next_vma;
- next_vma = vma ? vma->vm_next : NULL;
+ next_vma = vma ? vma_next(vma) : NULL;
}
if (vma && addr < vma->vm_start)
vma = NULL;
} else {
if (next_vma && addr >= next_vma->vm_start) {
vma = next_vma;
- next_vma = vma->vm_next;
+ next_vma = vma_next(vma);
}
}
#endif
Index: linux-2.6/mm/mempolicy.c
===================================================================
--- linux-2.6.orig/mm/mempolicy.c
+++ linux-2.6/mm/mempolicy.c
@@ -344,9 +344,9 @@ check_range(struct mm_struct *mm, unsign
if (!first)
return ERR_PTR(-EFAULT);
prev = NULL;
- for (vma = first; vma && vma->vm_start < end; vma = vma->vm_next) {
+ for (vma = first; vma && vma->vm_start < end; vma = vma_next(vma)) {
if (!(flags & MPOL_MF_DISCONTIG_OK)) {
- if (!vma->vm_next && vma->vm_end < end)
+ if (!vma_next(vma) && vma->vm_end < end)
return ERR_PTR(-EFAULT);
if (prev && prev->vm_end < vma->vm_start)
return ERR_PTR(-EFAULT);
@@ -403,7 +403,7 @@ static int mbind_range(struct vm_area_st
err = 0;
for (; vma && vma->vm_start < end; vma = next) {
- next = vma->vm_next;
+ next = vma_next(vma);
if (vma->vm_start < start)
err = split_vma(vma->vm_mm, vma, start, 1);
if (!err && vma->vm_end > end)
@@ -610,7 +610,7 @@ int migrate_to_node(struct mm_struct *mm
nodes_clear(nmask);
node_set(source, nmask);
- check_range(mm, mm->mmap->vm_start, TASK_SIZE, &nmask,
+ check_range(mm, __vma_next(&mm->mm_vmas, NULL)->vm_start, TASK_SIZE, &nmask,
flags | MPOL_MF_DISCONTIG_OK, &pagelist);
if (!list_empty(&pagelist))
@@ -1698,7 +1698,7 @@ void mpol_rebind_mm(struct mm_struct *mm
struct vm_area_struct *vma;
down_write(&mm->mmap_sem);
- for (vma = mm->mmap; vma; vma = vma->vm_next)
+ list_for_each_entry(vma, &mm->mm_vmas, vm_list)
mpol_rebind_policy(vma->vm_policy, new);
up_write(&mm->mmap_sem);
}
Index: linux-2.6/mm/mlock.c
===================================================================
--- linux-2.6.orig/mm/mlock.c
+++ linux-2.6/mm/mlock.c
@@ -123,7 +123,7 @@ static int do_mlock(unsigned long start,
if (nstart >= end)
break;
- vma = prev->vm_next;
+ vma = vma_next(prev);
if (!vma || vma->vm_start != nstart) {
error = -ENOMEM;
break;
@@ -181,7 +181,7 @@ static int do_mlockall(int flags)
if (flags == MCL_FUTURE)
goto out;
- for (vma = current->mm->mmap; vma ; vma = prev->vm_next) {
+ list_for_each_entry(vma, ¤t->mm->mm_vmas, vm_list) {
unsigned int newflags;
newflags = vma->vm_flags | VM_LOCKED;
Index: linux-2.6/mm/mprotect.c
===================================================================
--- linux-2.6.orig/mm/mprotect.c
+++ linux-2.6/mm/mprotect.c
@@ -302,7 +302,7 @@ sys_mprotect(unsigned long start, size_t
if (nstart >= end)
goto out;
- vma = prev->vm_next;
+ vma = vma_next(prev);
if (!vma || vma->vm_start != nstart) {
error = -ENOMEM;
goto out;
Index: linux-2.6/mm/mremap.c
===================================================================
--- linux-2.6.orig/mm/mremap.c
+++ linux-2.6/mm/mremap.c
@@ -226,7 +226,7 @@ static unsigned long move_vma(struct vm_
if (excess) {
vma->vm_flags |= VM_ACCOUNT;
if (split)
- vma->vm_next->vm_flags |= VM_ACCOUNT;
+ vma_next(vma)->vm_flags |= VM_ACCOUNT;
}
if (vm_flags & VM_LOCKED) {
@@ -356,8 +356,9 @@ unsigned long do_mremap(unsigned long ad
!((flags & MREMAP_FIXED) && (addr != new_addr)) &&
(old_len != new_len || !(flags & MREMAP_MAYMOVE))) {
unsigned long max_addr = TASK_SIZE;
- if (vma->vm_next)
- max_addr = vma->vm_next->vm_start;
+ struct vm_area_struct *next = vma_next(vma);
+ if (next)
+ max_addr = next->vm_start;
/* can we just expand the current mapping? */
if (max_addr - addr >= new_len) {
int pages = (new_len - old_len) >> PAGE_SHIFT;
Index: linux-2.6/mm/msync.c
===================================================================
--- linux-2.6.orig/mm/msync.c
+++ linux-2.6/mm/msync.c
@@ -93,7 +93,7 @@ asmlinkage long sys_msync(unsigned long
error = 0;
goto out_unlock;
}
- vma = vma->vm_next;
+ vma = vma_next(vma);
}
}
out_unlock:
Index: linux-2.6/mm/swapfile.c
===================================================================
--- linux-2.6.orig/mm/swapfile.c
+++ linux-2.6/mm/swapfile.c
@@ -626,7 +626,7 @@ static int unuse_mm(struct mm_struct *mm
down_read(&mm->mmap_sem);
lock_page(page);
}
- for (vma = mm->mmap; vma; vma = vma->vm_next) {
+ list_for_each_entry(vma, &mm->mm_vmas, vm_list) {
if (vma->anon_vma && unuse_vma(vma, entry, page))
break;
}
Index: linux-2.6/mm/migrate.c
===================================================================
--- linux-2.6.orig/mm/migrate.c
+++ linux-2.6/mm/migrate.c
@@ -1006,7 +1006,7 @@ int migrate_vmas(struct mm_struct *mm, c
struct vm_area_struct *vma;
int err = 0;
- for(vma = mm->mmap; vma->vm_next && !err; vma = vma->vm_next) {
+ list_for_each_entry(vma, &mm->mm_vmas, vm_list) {
if (vma->vm_ops && vma->vm_ops->migrate) {
err = vma->vm_ops->migrate(vma, to, from, flags);
if (err)
Index: linux-2.6/arch/alpha/kernel/osf_sys.c
===================================================================
--- linux-2.6.orig/arch/alpha/kernel/osf_sys.c
+++ linux-2.6/arch/alpha/kernel/osf_sys.c
@@ -1255,7 +1255,7 @@ arch_get_unmapped_area_1(unsigned long a
if (!vma || addr + len <= vma->vm_start)
return addr;
addr = vma->vm_end;
- vma = vma->vm_next;
+ vma = vma_next(vma);
}
}
Index: linux-2.6/arch/arm/mm/mmap.c
===================================================================
--- linux-2.6.orig/arch/arm/mm/mmap.c
+++ linux-2.6/arch/arm/mm/mmap.c
@@ -84,7 +84,7 @@ full_search:
else
addr = PAGE_ALIGN(addr);
- for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+ for (vma = find_vma(mm, addr); ; vma = vma_next(vma)) {
/* At this point: (!vma || addr < vma->vm_end). */
if (TASK_SIZE - len < addr) {
/*
Index: linux-2.6/arch/frv/mm/elf-fdpic.c
===================================================================
--- linux-2.6.orig/arch/frv/mm/elf-fdpic.c
+++ linux-2.6/arch/frv/mm/elf-fdpic.c
@@ -86,7 +86,7 @@ unsigned long arch_get_unmapped_area(str
if (addr <= limit) {
vma = find_vma(current->mm, PAGE_SIZE);
- for (; vma; vma = vma->vm_next) {
+ for (; vma; vma = vma_next(vma)) {
if (addr > limit)
break;
if (addr + len <= vma->vm_start)
@@ -101,7 +101,7 @@ unsigned long arch_get_unmapped_area(str
limit = TASK_SIZE - len;
if (addr <= limit) {
vma = find_vma(current->mm, addr);
- for (; vma; vma = vma->vm_next) {
+ for (; vma; vma = vma_next(vma)) {
if (addr > limit)
break;
if (addr + len <= vma->vm_start)
Index: linux-2.6/arch/ia64/kernel/sys_ia64.c
===================================================================
--- linux-2.6.orig/arch/ia64/kernel/sys_ia64.c
+++ linux-2.6/arch/ia64/kernel/sys_ia64.c
@@ -58,7 +58,7 @@ arch_get_unmapped_area (struct file *fil
full_search:
start_addr = addr = (addr + align_mask) & ~align_mask;
- for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+ for (vma = find_vma(mm, addr); ; vma = vma_next(vma)) {
/* At this point: (!vma || addr < vma->vm_end). */
if (TASK_SIZE - len < addr || RGN_MAP_LIMIT - len < REGION_OFFSET(addr)) {
if (start_addr != TASK_UNMAPPED_BASE) {
Index: linux-2.6/arch/ia64/mm/hugetlbpage.c
===================================================================
--- linux-2.6.orig/arch/ia64/mm/hugetlbpage.c
+++ linux-2.6/arch/ia64/mm/hugetlbpage.c
@@ -161,7 +161,7 @@ unsigned long hugetlb_get_unmapped_area(
addr = HPAGE_REGION_BASE;
else
addr = ALIGN(addr, HPAGE_SIZE);
- for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
+ for (vmm = find_vma(current->mm, addr); ; vmm = vma_next(vma)) {
/* At this point: (!vmm || addr < vmm->vm_end). */
if (REGION_OFFSET(addr) + len > RGN_MAP_LIMIT)
return -ENOMEM;
Index: linux-2.6/arch/mips/kernel/irixelf.c
===================================================================
--- linux-2.6.orig/arch/mips/kernel/irixelf.c
+++ linux-2.6/arch/mips/kernel/irixelf.c
@@ -718,7 +718,7 @@ static int load_irix_binary(struct linux
/* OK, This is the point of no return */
current->mm->end_data = 0;
current->mm->end_code = 0;
- current->mm->mmap = NULL;
+ INIT_LIST_HEAD(¤t->mm->mm_vmas);
current->flags &= ~PF_FORKNOEXEC;
elf_entry = (unsigned int) elf_ex.e_entry;
@@ -1108,7 +1108,7 @@ static int irix_core_dump(long signr, st
/* Count what's needed to dump, up to the limit of coredump size. */
segs = 0;
size = 0;
- for (vma = current->mm->mmap; vma != NULL; vma = vma->vm_next) {
+ list_for_each_entry(vma, ¤t->mm->mm_vmas, vm_list) {
if (maydump(vma))
{
int sz = vma->vm_end-vma->vm_start;
@@ -1267,12 +1267,13 @@ static int irix_core_dump(long signr, st
dataoff = offset = roundup(offset, PAGE_SIZE);
/* Write program headers for segments dump. */
- for (vma = current->mm->mmap, i = 0;
- i < segs && vma != NULL; vma = vma->vm_next) {
+ i = 0
+ list_for_each_entry(vma, ¤t->mm->mm_vmas, vm_list) {
struct elf_phdr phdr;
size_t sz;
- i++;
+ if (i++ == segs)
+ break;
sz = vma->vm_end - vma->vm_start;
@@ -1301,15 +1302,16 @@ static int irix_core_dump(long signr, st
DUMP_SEEK(dataoff);
- for (i = 0, vma = current->mm->mmap;
- i < segs && vma != NULL;
- vma = vma->vm_next) {
+ i = 0
+ list_for_each_entry(vma, ¤t->mm->mm_vmas, vm_list) {
unsigned long addr = vma->vm_start;
unsigned long len = vma->vm_end - vma->vm_start;
if (!maydump(vma))
continue;
- i++;
+
+ if (i++ == segs)
+ break;
pr_debug("elf_core_dump: writing %08lx %lx\n", addr, len);
DUMP_WRITE((void __user *)addr, len);
}
Index: linux-2.6/arch/mips/kernel/syscall.c
===================================================================
--- linux-2.6.orig/arch/mips/kernel/syscall.c
+++ linux-2.6/arch/mips/kernel/syscall.c
@@ -103,7 +103,7 @@ unsigned long arch_get_unmapped_area(str
else
addr = PAGE_ALIGN(addr);
- for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
+ for (vmm = find_vma(current->mm, addr); ; vmm = vma_next(vmm)) {
/* At this point: (!vmm || addr < vmm->vm_end). */
if (task_size - len < addr)
return -ENOMEM;
Index: linux-2.6/arch/parisc/kernel/sys_parisc.c
===================================================================
--- linux-2.6.orig/arch/parisc/kernel/sys_parisc.c
+++ linux-2.6/arch/parisc/kernel/sys_parisc.c
@@ -52,7 +52,7 @@ static unsigned long get_unshared_area(u
addr = PAGE_ALIGN(addr);
- for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
+ for (vma = find_vma(current->mm, addr); ; vma = vma_next(vma)) {
/* At this point: (!vma || addr < vma->vm_end). */
if (TASK_SIZE - len < addr)
return -ENOMEM;
@@ -88,7 +88,7 @@ static unsigned long get_shared_area(str
addr = DCACHE_ALIGN(addr - offset) + offset;
- for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
+ for (vma = find_vma(current->mm, addr); ; vma = vma_next(vma)) {
/* At this point: (!vma || addr < vma->vm_end). */
if (TASK_SIZE - len < addr)
return -ENOMEM;
Index: linux-2.6/arch/powerpc/mm/tlb_32.c
===================================================================
--- linux-2.6.orig/arch/powerpc/mm/tlb_32.c
+++ linux-2.6/arch/powerpc/mm/tlb_32.c
@@ -154,7 +154,7 @@ void flush_tlb_mm(struct mm_struct *mm)
* unmap_region or exit_mmap, but not from vmtruncate on SMP -
* but it seems dup_mmap is the only SMP case which gets here.
*/
- for (mp = mm->mmap; mp != NULL; mp = mp->vm_next)
+ list_for_each_entry(mp, &mm->mm_vmas, vm_list)
flush_range(mp->vm_mm, mp->vm_start, mp->vm_end);
FINISH_FLUSH;
}
Index: linux-2.6/arch/ppc/mm/tlb.c
===================================================================
--- linux-2.6.orig/arch/ppc/mm/tlb.c
+++ linux-2.6/arch/ppc/mm/tlb.c
@@ -148,7 +148,7 @@ void flush_tlb_mm(struct mm_struct *mm)
return;
}
- for (mp = mm->mmap; mp != NULL; mp = mp->vm_next)
+ list_for_each_entry(mp, &mm->mm_vmas, vm_list)
flush_range(mp->vm_mm, mp->vm_start, mp->vm_end);
FINISH_FLUSH;
}
Index: linux-2.6/arch/sh/kernel/sys_sh.c
===================================================================
--- linux-2.6.orig/arch/sh/kernel/sys_sh.c
+++ linux-2.6/arch/sh/kernel/sys_sh.c
@@ -107,7 +107,7 @@ full_search:
else
addr = PAGE_ALIGN(mm->free_area_cache);
- for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+ for (vma = find_vma(mm, addr); ; vma = vma_next(vma)) {
/* At this point: (!vma || addr < vma->vm_end). */
if (unlikely(TASK_SIZE - len < addr)) {
/*
Index: linux-2.6/arch/sh/mm/cache-sh4.c
===================================================================
--- linux-2.6.orig/arch/sh/mm/cache-sh4.c
+++ linux-2.6/arch/sh/mm/cache-sh4.c
@@ -396,7 +396,7 @@ void flush_cache_mm(struct mm_struct *mm
* In this case there are reasonably sized ranges to flush,
* iterate through the VMA list and take care of any aliases.
*/
- for (vma = mm->mmap; vma; vma = vma->vm_next)
+ list_for_each_entry(vma, &mm->mm_vmas, vm_list)
__flush_cache_mm(mm, vma->vm_start, vma->vm_end);
}
Index: linux-2.6/arch/sh64/kernel/sys_sh64.c
===================================================================
--- linux-2.6.orig/arch/sh64/kernel/sys_sh64.c
+++ linux-2.6/arch/sh64/kernel/sys_sh64.c
@@ -119,7 +119,7 @@ unsigned long arch_get_unmapped_area(str
else
addr = COLOUR_ALIGN(addr);
- for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
+ for (vma = find_vma(current->mm, addr); ; vma = vma_next(vma)) {
/* At this point: (!vma || addr < vma->vm_end). */
if (TASK_SIZE - len < addr)
return -ENOMEM;
Index: linux-2.6/arch/sparc/kernel/sys_sparc.c
===================================================================
--- linux-2.6.orig/arch/sparc/kernel/sys_sparc.c
+++ linux-2.6/arch/sparc/kernel/sys_sparc.c
@@ -64,7 +64,7 @@ unsigned long arch_get_unmapped_area(str
else
addr = PAGE_ALIGN(addr);
- for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
+ for (vmm = find_vma(current->mm, addr); ; vmm = vma_next(vmm)) {
/* At this point: (!vmm || addr < vmm->vm_end). */
if (ARCH_SUN4C_SUN4 && addr < 0xe0000000 && 0x20000000 - len < addr) {
addr = PAGE_OFFSET;
Index: linux-2.6/arch/sparc64/kernel/binfmt_aout32.c
===================================================================
--- linux-2.6.orig/arch/sparc64/kernel/binfmt_aout32.c
+++ linux-2.6/arch/sparc64/kernel/binfmt_aout32.c
@@ -242,7 +242,7 @@ static int load_aout32_binary(struct lin
current->mm->free_area_cache = current->mm->mmap_base;
current->mm->cached_hole_size = 0;
- current->mm->mmap = NULL;
+ LIST_HEAD_INIT(¤t->mm->mm_vmas);
compute_creds(bprm);
current->flags &= ~PF_FORKNOEXEC;
if (N_MAGIC(ex) == NMAGIC) {
Index: linux-2.6/arch/sparc64/kernel/sys_sparc.c
===================================================================
--- linux-2.6.orig/arch/sparc64/kernel/sys_sparc.c
+++ linux-2.6/arch/sparc64/kernel/sys_sparc.c
@@ -166,7 +166,7 @@ full_search:
else
addr = PAGE_ALIGN(addr);
- for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+ for (vma = find_vma(mm, addr); ; vma = vma_next(vma)) {
/* At this point: (!vma || addr < vma->vm_end). */
if (addr < VA_EXCLUDE_START &&
(addr + len) >= VA_EXCLUDE_START) {
Index: linux-2.6/arch/sparc64/mm/hugetlbpage.c
===================================================================
--- linux-2.6.orig/arch/sparc64/mm/hugetlbpage.c
+++ linux-2.6/arch/sparc64/mm/hugetlbpage.c
@@ -54,7 +54,7 @@ static unsigned long hugetlb_get_unmappe
full_search:
addr = ALIGN(addr, HPAGE_SIZE);
- for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+ for (vma = find_vma(mm, addr); ; vma = vma_next(vma)) {
/* At this point: (!vma || addr < vma->vm_end). */
if (addr < VA_EXCLUDE_START &&
(addr + len) >= VA_EXCLUDE_START) {
Index: linux-2.6/arch/x86_64/ia32/ia32_aout.c
===================================================================
--- linux-2.6.orig/arch/x86_64/ia32/ia32_aout.c
+++ linux-2.6/arch/x86_64/ia32/ia32_aout.c
@@ -311,7 +311,7 @@ static int load_aout_binary(struct linux
current->mm->free_area_cache = TASK_UNMAPPED_BASE;
current->mm->cached_hole_size = 0;
- current->mm->mmap = NULL;
+ INIT_LIST_HEAD(¤t->mm->mm_vmas);
compute_creds(bprm);
current->flags &= ~PF_FORKNOEXEC;
Index: linux-2.6/fs/binfmt_aout.c
===================================================================
--- linux-2.6.orig/fs/binfmt_aout.c
+++ linux-2.6/fs/binfmt_aout.c
@@ -323,7 +323,7 @@ static int load_aout_binary(struct linux
current->mm->free_area_cache = current->mm->mmap_base;
current->mm->cached_hole_size = 0;
- current->mm->mmap = NULL;
+ INIT_LIST_HEAD(¤t->mm->mm_vmas);
compute_creds(bprm);
current->flags &= ~PF_FORKNOEXEC;
#ifdef __sparc__
Index: linux-2.6/include/linux/init_task.h
===================================================================
--- linux-2.6.orig/include/linux/init_task.h
+++ linux-2.6/include/linux/init_task.h
@@ -46,6 +46,7 @@
#define INIT_MM(name) \
{ \
+ .mm_vmas = LIST_HEAD_INIT(name.mm_vmas), \
.mm_rb = RB_ROOT, \
.pgd = swapper_pg_dir, \
.mm_users = ATOMIC_INIT(2), \
Index: linux-2.6/include/linux/mm.h
===================================================================
--- linux-2.6.orig/include/linux/mm.h
+++ linux-2.6/include/linux/mm.h
@@ -36,6 +36,7 @@ extern int sysctl_legacy_va_layout;
#define sysctl_legacy_va_layout 0
#endif
+#include <linux/sched.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
@@ -64,7 +65,7 @@ struct vm_area_struct {
within vm_mm. */
/* linked list of VM areas per task, sorted by address */
- struct vm_area_struct *vm_next;
+ struct list_head vm_list;
pgprot_t vm_page_prot; /* Access permissions of this VMA. */
unsigned long vm_flags; /* Flags, listed below. */
@@ -114,6 +115,42 @@ struct vm_area_struct {
#endif
};
+static inline struct vm_area_struct *
+__vma_next(struct list_head *head, struct vm_area_struct *vma)
+{
+ if (unlikely(!vma))
+ vma = container_of(head, struct vm_area_struct, vm_list);
+
+ if (vma->vm_list.next == head)
+ return NULL;
+
+ return list_entry(vma->vm_list.next, struct vm_area_struct, vm_list);
+}
+
+static inline struct vm_area_struct *
+vma_next(struct vm_area_struct *vma)
+{
+ return __vma_next(&vma->vm_mm->mm_vmas, vma);
+}
+
+static inline struct vm_area_struct *
+__vma_prev(struct list_head *head, struct vm_area_struct *vma)
+{
+ if (unlikely(!vma))
+ vma = container_of(head, struct vm_area_struct, vm_list);
+
+ if (vma->vm_list.prev == head)
+ return NULL;
+
+ return list_entry(vma->vm_list.prev, struct vm_area_struct, vm_list);
+}
+
+static inline struct vm_area_struct *
+vma_prev(struct vm_area_struct *vma)
+{
+ return __vma_prev(&vma->vm_mm->mm_vmas, vma);
+}
+
extern struct kmem_cache *vm_area_cachep;
/*
@@ -740,13 +777,14 @@ struct zap_details {
struct page *vm_normal_page(struct vm_area_struct *, unsigned long, pte_t);
unsigned long zap_page_range(struct vm_area_struct *vma, unsigned long address,
unsigned long size, struct zap_details *);
-unsigned long unmap_vmas(struct mmu_gather **tlb,
+unsigned long unmap_vmas(struct mmu_gather **tlb, struct list_head *vmas,
struct vm_area_struct *start_vma, unsigned long start_addr,
unsigned long end_addr, unsigned long *nr_accounted,
struct zap_details *);
void free_pgd_range(struct mmu_gather **tlb, unsigned long addr,
unsigned long end, unsigned long floor, unsigned long ceiling);
-void free_pgtables(struct mmu_gather **tlb, struct vm_area_struct *start_vma,
+void free_pgtables(struct mmu_gather **tlb, struct list_head *vmas,
+ struct vm_area_struct *start_vma,
unsigned long floor, unsigned long ceiling);
int copy_page_range(struct mm_struct *dst, struct mm_struct *src,
struct vm_area_struct *vma);
Index: linux-2.6/include/linux/sched.h
===================================================================
--- linux-2.6.orig/include/linux/sched.h
+++ linux-2.6/include/linux/sched.h
@@ -321,7 +321,7 @@ typedef unsigned long mm_counter_t;
} while (0)
struct mm_struct {
- struct vm_area_struct * mmap; /* list of VMAs */
+ struct list_head mm_vmas; /* list of VMAs */
struct rb_root mm_rb;
struct vm_area_struct * mmap_cache; /* last find_vma result */
unsigned long (*get_unmapped_area) (struct file *filp,
Index: linux-2.6/kernel/fork.c
===================================================================
--- linux-2.6.orig/kernel/fork.c
+++ linux-2.6/kernel/fork.c
@@ -196,7 +196,7 @@ static struct task_struct *dup_task_stru
#ifdef CONFIG_MMU
static inline int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
{
- struct vm_area_struct *mpnt, *tmp, **pprev;
+ struct vm_area_struct *mpnt, *tmp;
struct rb_node **rb_link, *rb_parent;
int retval;
unsigned long charge;
@@ -210,7 +210,6 @@ static inline int dup_mmap(struct mm_str
down_write_nested(&mm->mmap_sem, SINGLE_DEPTH_NESTING);
mm->locked_vm = 0;
- mm->mmap = NULL;
mm->mmap_cache = NULL;
mm->free_area_cache = oldmm->mmap_base;
mm->cached_hole_size = ~0UL;
@@ -219,9 +218,8 @@ static inline int dup_mmap(struct mm_str
mm->mm_rb = RB_ROOT;
rb_link = &mm->mm_rb.rb_node;
rb_parent = NULL;
- pprev = &mm->mmap;
- for (mpnt = oldmm->mmap; mpnt; mpnt = mpnt->vm_next) {
+ list_for_each_entry(mpnt, &oldmm->mm_vmas, vm_list) {
struct file *file;
if (mpnt->vm_flags & VM_DONTCOPY) {
@@ -249,7 +247,6 @@ static inline int dup_mmap(struct mm_str
vma_set_policy(tmp, pol);
tmp->vm_flags &= ~VM_LOCKED;
tmp->vm_mm = mm;
- tmp->vm_next = NULL;
anon_vma_link(tmp);
file = tmp->vm_file;
if (file) {
@@ -270,9 +267,7 @@ static inline int dup_mmap(struct mm_str
/*
* Link in the new vma and copy the page table entries.
*/
- *pprev = tmp;
- pprev = &tmp->vm_next;
-
+ list_add_tail(&tmp->vm_list, &mm->mm_vmas);
__vma_link_rb(mm, tmp, rb_link, rb_parent);
rb_link = &tmp->vm_rb.rb_right;
rb_parent = &tmp->vm_rb;
@@ -329,6 +324,7 @@ static inline void mm_free_pgd(struct mm
static struct mm_struct * mm_init(struct mm_struct * mm)
{
+ INIT_LIST_HEAD(&mm->mm_vmas);
atomic_set(&mm->mm_users, 1);
atomic_set(&mm->mm_count, 1);
init_rwsem(&mm->mmap_sem);
Index: linux-2.6/mm/mmap.c
===================================================================
--- linux-2.6.orig/mm/mmap.c
+++ linux-2.6/mm/mmap.c
@@ -35,7 +35,7 @@
#define arch_mmap_check(addr, len, flags) (0)
#endif
-static void unmap_region(struct mm_struct *mm,
+static void unmap_region(struct mm_struct *mm, struct list_head *vmas,
struct vm_area_struct *vma, struct vm_area_struct *prev,
unsigned long start, unsigned long end);
@@ -220,18 +220,16 @@ void unlink_file_vma(struct vm_area_stru
/*
* Close a vm structure and free it, returning the next.
*/
-static struct vm_area_struct *remove_vma(struct vm_area_struct *vma)
+static void remove_vma(struct vm_area_struct *vma)
{
- struct vm_area_struct *next = vma->vm_next;
-
might_sleep();
+ list_del(&vma->vm_list);
if (vma->vm_ops && vma->vm_ops->close)
vma->vm_ops->close(vma);
if (vma->vm_file)
fput(vma->vm_file);
mpol_free(vma_policy(vma));
kmem_cache_free(vm_area_cachep, vma);
- return next;
}
asmlinkage unsigned long sys_brk(unsigned long brk)
@@ -316,11 +314,9 @@ void validate_mm(struct mm_struct *mm)
{
int bug = 0;
int i = 0;
- struct vm_area_struct *tmp = mm->mmap;
- while (tmp) {
- tmp = tmp->vm_next;
+ struct vm_area_struct *vma;
+ list_for_each_entry(vma, &mm->mm_vmas, vm_list)
i++;
- }
if (i != mm->map_count)
printk("map_count %d vm_next %d\n", mm->map_count, i), bug = 1;
i = browse_rb(&mm->mm_rb);
@@ -374,15 +370,15 @@ __vma_link_list(struct mm_struct *mm, st
struct vm_area_struct *prev, struct rb_node *rb_parent)
{
if (prev) {
- vma->vm_next = prev->vm_next;
- prev->vm_next = vma;
+ list_add(&vma->vm_list, &prev->vm_list);
} else {
- mm->mmap = vma;
- if (rb_parent)
- vma->vm_next = rb_entry(rb_parent,
+ if (rb_parent) {
+ struct vm_area_struct *next =
+ rb_entry(rb_parent,
struct vm_area_struct, vm_rb);
- else
- vma->vm_next = NULL;
+ list_add_tail(&vma->vm_list, &next->vm_list);
+ } else
+ list_add(&vma->vm_list, &mm->mm_vmas);
}
}
@@ -472,7 +468,7 @@ static inline void
__vma_unlink(struct mm_struct *mm, struct vm_area_struct *vma,
struct vm_area_struct *prev)
{
- prev->vm_next = vma->vm_next;
+ list_del(&vma->vm_list);
rb_erase(&vma->vm_rb, &mm->mm_rb);
if (mm->mmap_cache == vma)
mm->mmap_cache = prev;
@@ -489,7 +485,7 @@ void vma_adjust(struct vm_area_struct *v
unsigned long end, pgoff_t pgoff, struct vm_area_struct *insert)
{
struct mm_struct *mm = vma->vm_mm;
- struct vm_area_struct *next = vma->vm_next;
+ struct vm_area_struct *next = vma_next(vma);
struct vm_area_struct *importer = NULL;
struct address_space *mapping = NULL;
struct prio_tree_root *root = NULL;
@@ -630,7 +626,7 @@ again: remove_next = 1 + (end > next->
* up the code too much to do both in one go.
*/
if (remove_next == 2) {
- next = vma->vm_next;
+ next = vma_next(vma);
goto again;
}
}
@@ -751,13 +747,10 @@ struct vm_area_struct *vma_merge(struct
if (vm_flags & VM_SPECIAL)
return NULL;
- if (prev)
- next = prev->vm_next;
- else
- next = mm->mmap;
+ next = __vma_next(&mm->mm_vmas, prev);
area = next;
if (next && next->vm_end == end) /* cases 6, 7, 8 */
- next = next->vm_next;
+ next = vma_next(next);
/*
* Can it merge with the predecessor?
@@ -816,7 +809,7 @@ struct anon_vma *find_mergeable_anon_vma
struct vm_area_struct *near;
unsigned long vm_flags;
- near = vma->vm_next;
+ near = vma_next(vma);
if (!near)
goto try_prev;
@@ -902,6 +895,7 @@ unsigned long do_mmap_pgoff(struct file
struct rb_node ** rb_link, * rb_parent;
int accountable = 1;
unsigned long charged = 0, reqprot = prot;
+ LIST_HEAD(vmas);
/*
* Does the application expect PROT_READ to imply PROT_EXEC?
@@ -1165,7 +1159,8 @@ unmap_and_free_vma:
fput(file);
/* Undo any partial mapping done by a device driver. */
- unmap_region(mm, vma, prev, vma->vm_start, vma->vm_end);
+ list_add(&vma->vm_list, &vmas);
+ unmap_region(mm, &vmas, vma, prev, vma->vm_start, vma->vm_end);
charged = 0;
free_vma:
kmem_cache_free(vm_area_cachep, vma);
@@ -1218,7 +1213,7 @@ arch_get_unmapped_area(struct file *filp
}
full_search:
- for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+ for (vma = find_vma(mm, addr); ; vma = vma_next(vma)) {
/* At this point: (!vma || addr < vma->vm_end). */
if (TASK_SIZE - len < addr) {
/*
@@ -1429,14 +1424,11 @@ struct vm_area_struct *
find_vma_prev(struct mm_struct *mm, unsigned long addr,
struct vm_area_struct **pprev)
{
- struct vm_area_struct *vma = NULL, *prev = NULL;
+ struct vm_area_struct *prev = NULL, *next;
struct rb_node * rb_node;
if (!mm)
goto out;
- /* Guard against addr being lower than the first VMA */
- vma = mm->mmap;
-
/* Go through the RB tree quickly. */
rb_node = mm->mm_rb.rb_node;
@@ -1448,7 +1440,8 @@ find_vma_prev(struct mm_struct *mm, unsi
rb_node = rb_node->rb_left;
} else {
prev = vma_tmp;
- if (!prev->vm_next || (addr < prev->vm_next->vm_end))
+ next = __vma_next(&mm->mm_vmas, prev);
+ if (!next || (addr < next->vm_end))
break;
rb_node = rb_node->rb_right;
}
@@ -1456,7 +1449,7 @@ find_vma_prev(struct mm_struct *mm, unsi
out:
*pprev = prev;
- return prev ? prev->vm_next : vma;
+ return __vma_next(&mm->mm_vmas, prev);
}
/*
@@ -1655,18 +1648,21 @@ find_extend_vma(struct mm_struct * mm, u
*
* Called with the mm semaphore held.
*/
-static void remove_vma_list(struct mm_struct *mm, struct vm_area_struct *vma)
+static void remove_vma_list(struct mm_struct *mm, struct list_head *vmas,
+ struct vm_area_struct *vma)
{
/* Update high watermark before we lower total_vm */
update_hiwater_vm(mm);
do {
+ struct vm_area_struct *next = __vma_next(vmas, vma);
long nrpages = vma_pages(vma);
mm->total_vm -= nrpages;
if (vma->vm_flags & VM_LOCKED)
mm->locked_vm -= nrpages;
vm_stat_account(mm, vma->vm_flags, vma->vm_file, -nrpages);
- vma = remove_vma(vma);
+ remove_vma(vma);
+ vma = next;
} while (vma);
validate_mm(mm);
}
@@ -1676,21 +1672,22 @@ static void remove_vma_list(struct mm_st
*
* Called with the mm semaphore held.
*/
-static void unmap_region(struct mm_struct *mm,
+static void unmap_region(struct mm_struct *mm, struct list_head *vmas,
struct vm_area_struct *vma, struct vm_area_struct *prev,
unsigned long start, unsigned long end)
{
- struct vm_area_struct *next = prev? prev->vm_next: mm->mmap;
+ struct vm_area_struct *next = __vma_next(&mm->mm_vmas, prev);
struct mmu_gather *tlb;
unsigned long nr_accounted = 0;
lru_add_drain();
tlb = tlb_gather_mmu(mm, 0);
update_hiwater_rss(mm);
- unmap_vmas(&tlb, vma, start, end, &nr_accounted, NULL);
+ unmap_vmas(&tlb, vmas, vma, start, end, &nr_accounted, NULL);
vm_unacct_memory(nr_accounted);
- free_pgtables(&tlb, vma, prev? prev->vm_end: FIRST_USER_ADDRESS,
- next? next->vm_start: 0);
+ free_pgtables(&tlb, vmas, vma,
+ prev ? prev->vm_end : FIRST_USER_ADDRESS,
+ next ? next->vm_start : 0);
tlb_finish_mmu(tlb, start, end);
}
@@ -1700,21 +1697,18 @@ static void unmap_region(struct mm_struc
*/
static void
detach_vmas_to_be_unmapped(struct mm_struct *mm, struct vm_area_struct *vma,
- struct vm_area_struct *prev, unsigned long end)
+ struct vm_area_struct *prev, unsigned long end,
+ struct list_head *vmas)
{
- struct vm_area_struct **insertion_point;
- struct vm_area_struct *tail_vma = NULL;
unsigned long addr;
- insertion_point = (prev ? &prev->vm_next : &mm->mmap);
do {
+ struct vm_area_struct *next = vma_next(vma);
rb_erase(&vma->vm_rb, &mm->mm_rb);
mm->map_count--;
- tail_vma = vma;
- vma = vma->vm_next;
+ list_move_tail(&vma->vm_list, vmas);
+ vma = next;
} while (vma && vma->vm_start < end);
- *insertion_point = vma;
- tail_vma->vm_next = NULL;
if (mm->unmap_area == arch_unmap_area)
addr = prev ? prev->vm_end : mm->mmap_base;
else
@@ -1784,6 +1778,7 @@ int do_munmap(struct mm_struct *mm, unsi
{
unsigned long end;
struct vm_area_struct *vma, *prev, *last;
+ LIST_HEAD(vmas);
if ((start & ~PAGE_MASK) || start > TASK_SIZE || len > TASK_SIZE-start)
return -EINVAL;
@@ -1823,16 +1818,16 @@ int do_munmap(struct mm_struct *mm, unsi
if (error)
return error;
}
- vma = prev? prev->vm_next: mm->mmap;
+ vma = __vma_next(&mm->mm_vmas, prev);
/*
* Remove the vma's, and unmap the actual pages
*/
- detach_vmas_to_be_unmapped(mm, vma, prev, end);
- unmap_region(mm, vma, prev, start, end);
+ detach_vmas_to_be_unmapped(mm, vma, prev, end, &vmas);
+ unmap_region(mm, &vmas, vma, prev, start, end);
/* Fix up all other VM information */
- remove_vma_list(mm, vma);
+ remove_vma_list(mm, &vmas, vma);
return 0;
}
@@ -1969,7 +1964,9 @@ EXPORT_SYMBOL(do_brk);
void exit_mmap(struct mm_struct *mm)
{
struct mmu_gather *tlb;
- struct vm_area_struct *vma = mm->mmap;
+ LIST_HEAD(vmas);
+ struct vm_area_struct *vma = __vma_next(&mm->mm_vmas, NULL);
+ struct vm_area_struct *next;
unsigned long nr_accounted = 0;
unsigned long end;
@@ -1978,20 +1975,21 @@ void exit_mmap(struct mm_struct *mm)
lru_add_drain();
flush_cache_mm(mm);
+ detach_vmas_to_be_unmapped(mm, vma, NULL, -1, &vmas);
tlb = tlb_gather_mmu(mm, 1);
/* Don't update_hiwater_rss(mm) here, do_exit already did */
/* Use -1 here to ensure all VMAs in the mm are unmapped */
- end = unmap_vmas(&tlb, vma, 0, -1, &nr_accounted, NULL);
+ end = unmap_vmas(&tlb, &vmas, vma, 0, -1, &nr_accounted, NULL);
vm_unacct_memory(nr_accounted);
- free_pgtables(&tlb, vma, FIRST_USER_ADDRESS, 0);
+ free_pgtables(&tlb, &vmas, vma, FIRST_USER_ADDRESS, 0);
tlb_finish_mmu(tlb, 0, end);
/*
* Walk the list again, actually closing and freeing it,
* with preemption enabled, without holding any MM locks.
*/
- while (vma)
- vma = remove_vma(vma);
+ list_for_each_entry_safe(vma, next, &vmas, vm_list)
+ remove_vma(vma);
BUG_ON(mm->nr_ptes > (FIRST_USER_ADDRESS+PMD_SIZE-1)>>PMD_SHIFT);
}
Index: linux-2.6/arch/um/kernel/skas/tlb.c
===================================================================
--- linux-2.6.orig/arch/um/kernel/skas/tlb.c
+++ linux-2.6/arch/um/kernel/skas/tlb.c
@@ -90,12 +90,10 @@ void flush_tlb_mm_skas(struct mm_struct
void force_flush_all_skas(void)
{
struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma = mm->mmap;
+ struct vm_area_struct *vma;
- while(vma != NULL) {
+ list_for_each_entry(vma, &mm->mm_vmas, vm_list)
fix_range(mm, vma->vm_start, vma->vm_end, 1);
- vma = vma->vm_next;
- }
}
void flush_tlb_page_skas(struct vm_area_struct *vma, unsigned long address)
--
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