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Message-ID: <604427e00904131246i2edc7abdy808decc5f8b83d6d@mail.gmail.com>
Date: Mon, 13 Apr 2009 12:46:53 -0700
From: Ying Han <yinghan@...gle.com>
To: linux-mm@...ck.org, linux-kernel <linux-kernel@...r.kernel.org>,
akpm <akpm@...ux-foundation.org>, torvalds@...ux-foundation.org,
Ingo Molnar <mingo@...e.hu>, Mike Waychison <mikew@...gle.com>,
Rohit Seth <rohitseth@...gle.com>,
Hugh Dickins <hugh@...itas.com>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
"H. Peter Anvin" <hpa@...or.com>,
Török Edwin <edwintorok@...il.com>,
Lee Schermerhorn <lee.schermerhorn@...com>,
Nick Piggin <npiggin@...e.de>,
Wu Fengguang <fengguang.wu@...el.com>
Subject: [v4][PATCH 2/4]Move FAULT_FLAG_xyz into handle_mm_fault() callers
Move FAULT_FLAG_xyz into handle_mm_fault() callers
This allows the callers to now pass down the full set of FAULT_FLAG_xyz
flags to handle_mm_fault(). All callers have been converted to the new
calling convention, there's almost certainly room for architectures to
clean up their code and then add FAULT_FLAG_RETRY when that support is added.
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Ying Han <yinghan@...gle.com>
---
arch/alpha/mm/fault.c | 3 ++-
arch/arm/mm/fault.c | 3 ++-
arch/avr32/mm/fault.c | 3 ++-
arch/cris/mm/fault.c | 3 ++-
arch/frv/mm/fault.c | 2 +-
arch/ia64/mm/fault.c | 3 ++-
arch/m32r/mm/fault.c | 2 +-
arch/m68k/mm/fault.c | 2 +-
arch/mips/mm/fault.c | 2 +-
arch/mn10300/mm/fault.c | 2 +-
arch/parisc/mm/fault.c | 3 ++-
arch/powerpc/mm/fault.c | 3 ++-
arch/powerpc/platforms/cell/spu_fault.c | 2 +-
arch/s390/lib/uaccess_pt.c | 3 ++-
arch/s390/mm/fault.c | 2 +-
arch/sh/mm/fault_32.c | 3 ++-
arch/sh/mm/tlbflush_64.c | 3 ++-
arch/sparc/mm/fault_32.c | 5 +++--
arch/sparc/mm/fault_64.c | 3 ++-
arch/um/kernel/trap.c | 3 ++-
arch/x86/mm/fault.c | 2 +-
arch/xtensa/mm/fault.c | 3 ++-
include/linux/mm.h | 4 ++--
mm/memory.c | 5 +++--
24 files changed, 42 insertions(+), 27 deletions(-)
diff --git a/arch/alpha/mm/fault.c b/arch/alpha/mm/fault.c
index 4829f96..9dfa449 100644
--- a/arch/alpha/mm/fault.c
+++ b/arch/alpha/mm/fault.c
@@ -146,7 +146,8 @@ do_page_fault(unsigned long address, unsigned long mmcsr,
/* If for any reason at all we couldn't handle the fault,
make sure we exit gracefully rather than endlessly redo
the fault. */
- fault = handle_mm_fault(mm, vma, address, cause > 0);
+ fault = handle_mm_fault(mm, vma, address,
+ cause > 0 ? FAULT_FLAG_WRITE : 0);
up_read(&mm->mmap_sem);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index 0455557..638335c 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -208,7 +208,8 @@ good_area:
* than endlessly redo the fault.
*/
survive:
- fault = handle_mm_fault(mm, vma, addr & PAGE_MASK, fsr & (1 << 11));
+ fault = handle_mm_fault(mm, vma, addr & PAGE_MASK,
+ (fsr & (1 << 11)) ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/avr32/mm/fault.c b/arch/avr32/mm/fault.c
index ce4e429..a53553e 100644
--- a/arch/avr32/mm/fault.c
+++ b/arch/avr32/mm/fault.c
@@ -133,7 +133,8 @@ good_area:
* fault.
*/
survive:
- fault = handle_mm_fault(mm, vma, address, writeaccess);
+ fault = handle_mm_fault(mm, vma, address,
+ writeaccess ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/cris/mm/fault.c b/arch/cris/mm/fault.c
index c4c76db..59b01c7 100644
--- a/arch/cris/mm/fault.c
+++ b/arch/cris/mm/fault.c
@@ -163,7 +163,8 @@ do_page_fault(unsigned long address, struct pt_regs *regs,
* the fault.
*/
- fault = handle_mm_fault(mm, vma, address, writeaccess & 1);
+ fault = handle_mm_fault(mm, vma, address,
+ (writeaccess & 1) ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/frv/mm/fault.c b/arch/frv/mm/fault.c
index 05093d4..30f5d10 100644
--- a/arch/frv/mm/fault.c
+++ b/arch/frv/mm/fault.c
@@ -163,7 +163,7 @@ asmlinkage void do_page_fault(int datammu, unsigned long esr
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(mm, vma, ear0, write);
+ fault = handle_mm_fault(mm, vma, ear0, write ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c
index 23088be..5add87f 100644
--- a/arch/ia64/mm/fault.c
+++ b/arch/ia64/mm/fault.c
@@ -154,7 +154,8 @@ ia64_do_page_fault (unsigned long address, unsigned long isr
* sure we exit gracefully rather than endlessly redo the
* fault.
*/
- fault = handle_mm_fault(mm, vma, address, (mask & VM_WRITE) != 0);
+ fault = handle_mm_fault(mm, vma, address,
+ (mask & VM_WRITE) ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
/*
* We ran out of memory, or some other thing happened
diff --git a/arch/m32r/mm/fault.c b/arch/m32r/mm/fault.c
index 4a71df4..7274b47 100644
--- a/arch/m32r/mm/fault.c
+++ b/arch/m32r/mm/fault.c
@@ -196,7 +196,7 @@ survive:
*/
addr = (address & PAGE_MASK);
set_thread_fault_code(error_code);
- fault = handle_mm_fault(mm, vma, addr, write);
+ fault = handle_mm_fault(mm, vma, addr, write ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c
index f493f03..d0e35cf 100644
--- a/arch/m68k/mm/fault.c
+++ b/arch/m68k/mm/fault.c
@@ -155,7 +155,7 @@ good_area:
*/
survive:
- fault = handle_mm_fault(mm, vma, address, write);
+ fault = handle_mm_fault(mm, vma, address, write ? FAULT_FLAG_WRITE : 0);
#ifdef DEBUG
printk("handle_mm_fault returns %d\n",fault);
#endif
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index 55767ad..6751ce9 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -102,7 +102,7 @@ good_area:
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(mm, vma, address, write);
+ fault = handle_mm_fault(mm, vma, address, write ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/mn10300/mm/fault.c b/arch/mn10300/mm/fault.c
index 33cf250..a62e1e1 100644
--- a/arch/mn10300/mm/fault.c
+++ b/arch/mn10300/mm/fault.c
@@ -258,7 +258,7 @@ good_area:
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(mm, vma, address, write);
+ fault = handle_mm_fault(mm, vma, address, write ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 92c7fa4..987bbfe 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -202,7 +202,8 @@ good_area:
* fault.
*/
- fault = handle_mm_fault(mm, vma, address, (acc_type & VM_WRITE) != 0);
+ fault = handle_mm_fault(mm, vma, address,
+ (acc_type & VM_WRITE) ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
/*
* We hit a shared mapping outside of the file, or some
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 91c7b86..96a4aaf 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -311,7 +311,8 @@ good_area:
* the fault.
*/
survive:
- ret = handle_mm_fault(mm, vma, address, is_write);
+ ret = handle_mm_fault(mm, vma, address,
+ is_write ? FAULT_FLAG_WRITE : 0);
if (unlikely(ret & VM_FAULT_ERROR)) {
if (ret & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/powerpc/platforms/cell/spu_fault.c b/arch/powerpc/platforms/ce
index c8b1cd4..3b934a0 100644
--- a/arch/powerpc/platforms/cell/spu_fault.c
+++ b/arch/powerpc/platforms/cell/spu_fault.c
@@ -73,7 +73,7 @@ good_area:
goto bad_area;
}
ret = 0;
- *flt = handle_mm_fault(mm, vma, ea, is_write);
+ *flt = handle_mm_fault(mm, vma, ea, is_write ? FAULT_FLAG_WRITE : 0);
if (unlikely(*flt & VM_FAULT_ERROR)) {
if (*flt & VM_FAULT_OOM) {
ret = -ENOMEM;
diff --git a/arch/s390/lib/uaccess_pt.c b/arch/s390/lib/uaccess_pt.c
index d66215b..4ee9d99 100644
--- a/arch/s390/lib/uaccess_pt.c
+++ b/arch/s390/lib/uaccess_pt.c
@@ -66,7 +66,8 @@ static int __handle_fault(struct mm_struct *mm, unsigned long
}
survive:
- fault = handle_mm_fault(mm, vma, address, write_access);
+ fault = handle_mm_fault(mm, vma, address,
+ write_access ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 4d53720..f08f3c3 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -375,7 +375,7 @@ survive:
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(mm, vma, address, write);
+ fault = handle_mm_fault(mm, vma, address, write ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM) {
if (do_out_of_memory(regs, error_code, address))
diff --git a/arch/sh/mm/fault_32.c b/arch/sh/mm/fault_32.c
index 31a33eb..78d2f8c 100644
--- a/arch/sh/mm/fault_32.c
+++ b/arch/sh/mm/fault_32.c
@@ -133,7 +133,8 @@ good_area:
* the fault.
*/
survive:
- fault = handle_mm_fault(mm, vma, address, writeaccess);
+ fault = handle_mm_fault(mm, vma, address,
+ writeaccess ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/sh/mm/tlbflush_64.c b/arch/sh/mm/tlbflush_64.c
index 7876997..5ee5d95 100644
--- a/arch/sh/mm/tlbflush_64.c
+++ b/arch/sh/mm/tlbflush_64.c
@@ -187,7 +187,8 @@ good_area:
* the fault.
*/
survive:
- fault = handle_mm_fault(mm, vma, address, writeaccess);
+ fault = handle_mm_fault(mm, vma, address,
+ writeaccess ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/sparc/mm/fault_32.c b/arch/sparc/mm/fault_32.c
index 12e447f..69ca75e 100644
--- a/arch/sparc/mm/fault_32.c
+++ b/arch/sparc/mm/fault_32.c
@@ -241,7 +241,7 @@ good_area:
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(mm, vma, address, write);
+ fault = handle_mm_fault(mm, vma, address, write ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
@@ -484,7 +484,8 @@ good_area:
if(!(vma->vm_flags & (VM_READ | VM_EXEC)))
goto bad_area;
}
- switch (handle_mm_fault(mm, vma, address, write)) {
+ switch (handle_mm_fault(mm, vma, address,
+ write ? FAULT_FLAG_WRITE : 0)) {
case VM_FAULT_SIGBUS:
case VM_FAULT_OOM:
goto do_sigbus;
diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c
index 4ab8993..539e829 100644
--- a/arch/sparc/mm/fault_64.c
+++ b/arch/sparc/mm/fault_64.c
@@ -398,7 +398,8 @@ good_area:
goto bad_area;
}
- fault = handle_mm_fault(mm, vma, address, (fault_code & FAULT_CODE_WRITE));
+ fault = handle_mm_fault(mm, vma, address,
+ (fault_code & FAULT_CODE_WRITE) ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
index 7384d8a..87d7a5e 100644
--- a/arch/um/kernel/trap.c
+++ b/arch/um/kernel/trap.c
@@ -65,7 +65,8 @@ good_area:
do {
int fault;
- fault = handle_mm_fault(mm, vma, address, is_write);
+ fault = handle_mm_fault(mm, vma, address,
+ is_write ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM) {
goto out_of_memory;
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index c76ef1d..63c1427 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -740,7 +740,7 @@ good_area:
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(mm, vma, address, write);
+ fault = handle_mm_fault(mm, vma, address, write ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/xtensa/mm/fault.c b/arch/xtensa/mm/fault.c
index bdd860d..abea2d7 100644
--- a/arch/xtensa/mm/fault.c
+++ b/arch/xtensa/mm/fault.c
@@ -106,7 +106,8 @@ good_area:
* the fault.
*/
survive:
- fault = handle_mm_fault(mm, vma, address, is_write);
+ fault = handle_mm_fault(mm, vma, address,
+ is_write ? FAULT_FLAG_WRITE : 0);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 065cdf8..9d22a5e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -808,11 +808,11 @@ extern int vmtruncate_range(struct inode * inode, loff_t o
#ifdef CONFIG_MMU
extern int handle_mm_fault(struct mm_struct *mm, struct vm_area_struct *vma,
- unsigned long address, int write_access);
+ unsigned long address, unsigned int flags);
#else
static inline int handle_mm_fault(struct mm_struct *mm,
struct vm_area_struct *vma, unsigned long address,
- int write_access)
+ unsigned init flags)
{
/* should never happen if there's no MMU */
BUG();
diff --git a/mm/memory.c b/mm/memory.c
index bfecdfb..98fcc63 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1305,6 +1305,8 @@ int __get_user_pages(struct task_struct *tsk, struct mm_st
cond_resched();
while (!(page = follow_page(vma, start, foll_flags))) {
int ret;
+
+ /* FOLL_WRITE matches FAULT_FLAG_WRITE */
ret = handle_mm_fault(mm, vma, start,
foll_flags & FOLL_WRITE);
if (ret & VM_FAULT_ERROR) {
@@ -2842,13 +2844,12 @@ unlock:
* By the time we get here, we already hold the mm semaphore
*/
int handle_mm_fault(struct mm_struct *mm, struct vm_area_struct *vma,
- unsigned long address, int write_access)
+ unsigned long address, unsigned int flags)
{
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
- unsigned int flags = write_access ? FAULT_FLAG_WRITE : 0;
__set_current_state(TASK_RUNNING);
--
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