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Message-Id: <20180123210719.10456-9-ebiederm@xmission.com>
Date: Tue, 23 Jan 2018 15:07:18 -0600
From: "Eric W. Biederman" <ebiederm@...ssion.com>
To: linux-kernel@...r.kernel.org
Cc: Al Viro <viro@...iv.linux.org.uk>, Oleg Nesterov <oleg@...hat.com>,
linux-arch@...r.kernel.org, Ram Pai <linuxram@...ibm.com>,
"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: [PATCH 09/10] mm/memory_failure: Remove unused trapno from memory_failure
Today 4 architectures set ARCH_SUPPORTS_MEMORY_FAILURE (arm64, parisc,
powerpc, and x86), while 4 other architectures set __ARCH_SI_TRAPNO
(alpha, metag, sparc, and tile). These two sets of architectures do
not interesect so remove the trapno paramater to remove confusion.
Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
---
arch/parisc/kernel/pdt.c | 2 +-
.../powerpc/platforms/powernv/opal-memory-errors.c | 2 +-
arch/x86/kernel/cpu/mcheck/mce.c | 6 ++--
drivers/acpi/apei/ghes.c | 2 +-
drivers/base/memory.c | 2 +-
drivers/ras/cec.c | 2 +-
include/linux/mm.h | 4 +--
mm/hwpoison-inject.c | 2 +-
mm/madvise.c | 2 +-
mm/memory-failure.c | 33 +++++++++-------------
10 files changed, 25 insertions(+), 32 deletions(-)
diff --git a/arch/parisc/kernel/pdt.c b/arch/parisc/kernel/pdt.c
index e07eb34c8750..36434d4da381 100644
--- a/arch/parisc/kernel/pdt.c
+++ b/arch/parisc/kernel/pdt.c
@@ -325,7 +325,7 @@ static int pdt_mainloop(void *unused)
#ifdef CONFIG_MEMORY_FAILURE
if ((pde & PDT_ADDR_PERM_ERR) ||
((pde & PDT_ADDR_SINGLE_ERR) == 0))
- memory_failure(pde >> PAGE_SHIFT, 0, 0);
+ memory_failure(pde >> PAGE_SHIFT, 0);
else
soft_offline_page(
pfn_to_page(pde >> PAGE_SHIFT), 0);
diff --git a/arch/powerpc/platforms/powernv/opal-memory-errors.c b/arch/powerpc/platforms/powernv/opal-memory-errors.c
index d9916ea62305..8ddc1accf199 100644
--- a/arch/powerpc/platforms/powernv/opal-memory-errors.c
+++ b/arch/powerpc/platforms/powernv/opal-memory-errors.c
@@ -60,7 +60,7 @@ static void handle_memory_error_event(struct OpalMemoryErrorData *merr_evt)
}
for (; paddr_start < paddr_end; paddr_start += PAGE_SIZE) {
- memory_failure(paddr_start >> PAGE_SHIFT, 0, 0);
+ memory_failure(paddr_start >> PAGE_SHIFT, 0);
}
}
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index b1d616d08eee..3b7319e25168 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -582,7 +582,7 @@ static int srao_decode_notifier(struct notifier_block *nb, unsigned long val,
if (mce_usable_address(mce) && (mce->severity == MCE_AO_SEVERITY)) {
pfn = mce->addr >> PAGE_SHIFT;
- memory_failure(pfn, MCE_VECTOR, 0);
+ memory_failure(pfn, 0);
}
return NOTIFY_OK;
@@ -1046,7 +1046,7 @@ static int do_memory_failure(struct mce *m)
pr_err("Uncorrected hardware memory error in user-access at %llx", m->addr);
if (!(m->mcgstatus & MCG_STATUS_RIPV))
flags |= MF_MUST_KILL;
- ret = memory_failure(m->addr >> PAGE_SHIFT, MCE_VECTOR, flags);
+ ret = memory_failure(m->addr >> PAGE_SHIFT, flags);
if (ret)
pr_err("Memory error not recovered");
return ret;
@@ -1325,7 +1325,7 @@ void do_machine_check(struct pt_regs *regs, long error_code)
EXPORT_SYMBOL_GPL(do_machine_check);
#ifndef CONFIG_MEMORY_FAILURE
-int memory_failure(unsigned long pfn, int vector, int flags)
+int memory_failure(unsigned long pfn, int flags)
{
/* mce_severity() should not hand us an ACTION_REQUIRED error */
BUG_ON(flags & MF_ACTION_REQUIRED);
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 6402f7fad3bb..bb5f9c643e0e 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -410,7 +410,7 @@ static void ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, int
flags = 0;
if (flags != -1)
- memory_failure_queue(pfn, 0, flags);
+ memory_failure_queue(pfn, flags);
#endif
}
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 1d60b58a8c19..fe4b24f05f6a 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -569,7 +569,7 @@ store_hard_offline_page(struct device *dev,
if (kstrtoull(buf, 0, &pfn) < 0)
return -EINVAL;
pfn >>= PAGE_SHIFT;
- ret = memory_failure(pfn, 0, 0);
+ ret = memory_failure(pfn, 0);
return ret ? ret : count;
}
diff --git a/drivers/ras/cec.c b/drivers/ras/cec.c
index ca44e6977cf2..2d9ec378a8bc 100644
--- a/drivers/ras/cec.c
+++ b/drivers/ras/cec.c
@@ -327,7 +327,7 @@ int cec_add_elem(u64 pfn)
} else {
/* We have reached max count for this page, soft-offline it. */
pr_err("Soft-offlining pfn: 0x%llx\n", pfn);
- memory_failure_queue(pfn, 0, MF_SOFT_OFFLINE);
+ memory_failure_queue(pfn, MF_SOFT_OFFLINE);
ca->pfns_poisoned++;
}
diff --git a/include/linux/mm.h b/include/linux/mm.h
index ea818ff739cd..7fc92384977e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2570,8 +2570,8 @@ enum mf_flags {
MF_MUST_KILL = 1 << 2,
MF_SOFT_OFFLINE = 1 << 3,
};
-extern int memory_failure(unsigned long pfn, int trapno, int flags);
-extern void memory_failure_queue(unsigned long pfn, int trapno, int flags);
+extern int memory_failure(unsigned long pfn, int flags);
+extern void memory_failure_queue(unsigned long pfn, int flags);
extern int unpoison_memory(unsigned long pfn);
extern int get_hwpoison_page(struct page *page);
#define put_hwpoison_page(page) put_page(page)
diff --git a/mm/hwpoison-inject.c b/mm/hwpoison-inject.c
index 356df057a2a8..b6ac70616c32 100644
--- a/mm/hwpoison-inject.c
+++ b/mm/hwpoison-inject.c
@@ -52,7 +52,7 @@ static int hwpoison_inject(void *data, u64 val)
inject:
pr_info("Injecting memory failure at pfn %#lx\n", pfn);
- return memory_failure(pfn, 18, MF_COUNT_INCREASED);
+ return memory_failure(pfn, MF_COUNT_INCREASED);
put_out:
put_hwpoison_page(p);
return 0;
diff --git a/mm/madvise.c b/mm/madvise.c
index 751e97aa2210..4d3c922ea1a1 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -661,7 +661,7 @@ static int madvise_inject_error(int behavior,
pr_info("Injecting memory failure for pfn %#lx at process virtual address %#lx\n",
page_to_pfn(page), start);
- ret = memory_failure(page_to_pfn(page), 0, MF_COUNT_INCREASED);
+ ret = memory_failure(page_to_pfn(page), MF_COUNT_INCREASED);
if (ret)
return ret;
}
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 4acdf393a801..c5f5f31bd979 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -178,7 +178,7 @@ EXPORT_SYMBOL_GPL(hwpoison_filter);
* ``action optional'' if they are not immediately affected by the error
* ``action required'' if error happened in current execution context
*/
-static int kill_proc(struct task_struct *t, unsigned long addr, int trapno,
+static int kill_proc(struct task_struct *t, unsigned long addr,
unsigned long pfn, struct page *page, int flags)
{
struct siginfo si;
@@ -189,9 +189,6 @@ static int kill_proc(struct task_struct *t, unsigned long addr, int trapno,
si.si_signo = SIGBUS;
si.si_errno = 0;
si.si_addr = (void *)addr;
-#ifdef __ARCH_SI_TRAPNO
- si.si_trapno = trapno;
-#endif
si.si_addr_lsb = compound_order(compound_head(page)) + PAGE_SHIFT;
if ((flags & MF_ACTION_REQUIRED) && t->mm == current->mm) {
@@ -323,7 +320,7 @@ static void add_to_kill(struct task_struct *tsk, struct page *p,
* Also when FAIL is set do a force kill because something went
* wrong earlier.
*/
-static void kill_procs(struct list_head *to_kill, int forcekill, int trapno,
+static void kill_procs(struct list_head *to_kill, int forcekill,
bool fail, struct page *page, unsigned long pfn,
int flags)
{
@@ -348,7 +345,7 @@ static void kill_procs(struct list_head *to_kill, int forcekill, int trapno,
* check for that, but we need to tell the
* process anyways.
*/
- else if (kill_proc(tk->tsk, tk->addr, trapno,
+ else if (kill_proc(tk->tsk, tk->addr,
pfn, page, flags) < 0)
pr_err("Memory failure: %#lx: Cannot send advisory machine check signal to %s:%d\n",
pfn, tk->tsk->comm, tk->tsk->pid);
@@ -927,7 +924,7 @@ EXPORT_SYMBOL_GPL(get_hwpoison_page);
* the pages and send SIGBUS to the processes if the data was dirty.
*/
static bool hwpoison_user_mappings(struct page *p, unsigned long pfn,
- int trapno, int flags, struct page **hpagep)
+ int flags, struct page **hpagep)
{
enum ttu_flags ttu = TTU_IGNORE_MLOCK | TTU_IGNORE_ACCESS;
struct address_space *mapping;
@@ -1017,7 +1014,7 @@ static bool hwpoison_user_mappings(struct page *p, unsigned long pfn,
* any accesses to the poisoned memory.
*/
forcekill = PageDirty(hpage) || (flags & MF_MUST_KILL);
- kill_procs(&tokill, forcekill, trapno, !unmap_success, p, pfn, flags);
+ kill_procs(&tokill, forcekill, !unmap_success, p, pfn, flags);
return unmap_success;
}
@@ -1045,7 +1042,7 @@ static int identify_page_state(unsigned long pfn, struct page *p,
return page_action(ps, p, pfn);
}
-static int memory_failure_hugetlb(unsigned long pfn, int trapno, int flags)
+static int memory_failure_hugetlb(unsigned long pfn, int flags)
{
struct page *p = pfn_to_page(pfn);
struct page *head = compound_head(p);
@@ -1090,7 +1087,7 @@ static int memory_failure_hugetlb(unsigned long pfn, int trapno, int flags)
return 0;
}
- if (!hwpoison_user_mappings(p, pfn, trapno, flags, &head)) {
+ if (!hwpoison_user_mappings(p, pfn, flags, &head)) {
action_result(pfn, MF_MSG_UNMAP_FAILED, MF_IGNORED);
res = -EBUSY;
goto out;
@@ -1105,7 +1102,6 @@ static int memory_failure_hugetlb(unsigned long pfn, int trapno, int flags)
/**
* memory_failure - Handle memory failure of a page.
* @pfn: Page Number of the corrupted page
- * @trapno: Trap number reported in the signal to user space.
* @flags: fine tune action taken
*
* This function is called by the low level machine check code
@@ -1120,7 +1116,7 @@ static int memory_failure_hugetlb(unsigned long pfn, int trapno, int flags)
* Must run in process context (e.g. a work queue) with interrupts
* enabled and no spinlocks hold.
*/
-int memory_failure(unsigned long pfn, int trapno, int flags)
+int memory_failure(unsigned long pfn, int flags)
{
struct page *p;
struct page *hpage;
@@ -1129,7 +1125,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
unsigned long page_flags;
if (!sysctl_memory_failure_recovery)
- panic("Memory failure from trap %d on page %lx", trapno, pfn);
+ panic("Memory failure on page %lx", pfn);
if (!pfn_valid(pfn)) {
pr_err("Memory failure: %#lx: memory outside kernel control\n",
@@ -1139,7 +1135,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
p = pfn_to_page(pfn);
if (PageHuge(p))
- return memory_failure_hugetlb(pfn, trapno, flags);
+ return memory_failure_hugetlb(pfn, flags);
if (TestSetPageHWPoison(p)) {
pr_err("Memory failure: %#lx: already hardware poisoned\n",
pfn);
@@ -1268,7 +1264,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
* When the raw error page is thp tail page, hpage points to the raw
* page after thp split.
*/
- if (!hwpoison_user_mappings(p, pfn, trapno, flags, &hpage)) {
+ if (!hwpoison_user_mappings(p, pfn, flags, &hpage)) {
action_result(pfn, MF_MSG_UNMAP_FAILED, MF_IGNORED);
res = -EBUSY;
goto out;
@@ -1296,7 +1292,6 @@ EXPORT_SYMBOL_GPL(memory_failure);
struct memory_failure_entry {
unsigned long pfn;
- int trapno;
int flags;
};
@@ -1312,7 +1307,6 @@ static DEFINE_PER_CPU(struct memory_failure_cpu, memory_failure_cpu);
/**
* memory_failure_queue - Schedule handling memory failure of a page.
* @pfn: Page Number of the corrupted page
- * @trapno: Trap number reported in the signal to user space.
* @flags: Flags for memory failure handling
*
* This function is called by the low level hardware error handler
@@ -1326,13 +1320,12 @@ static DEFINE_PER_CPU(struct memory_failure_cpu, memory_failure_cpu);
*
* Can run in IRQ context.
*/
-void memory_failure_queue(unsigned long pfn, int trapno, int flags)
+void memory_failure_queue(unsigned long pfn, int flags)
{
struct memory_failure_cpu *mf_cpu;
unsigned long proc_flags;
struct memory_failure_entry entry = {
.pfn = pfn,
- .trapno = trapno,
.flags = flags,
};
@@ -1365,7 +1358,7 @@ static void memory_failure_work_func(struct work_struct *work)
if (entry.flags & MF_SOFT_OFFLINE)
soft_offline_page(pfn_to_page(entry.pfn), entry.flags);
else
- memory_failure(entry.pfn, entry.trapno, entry.flags);
+ memory_failure(entry.pfn, entry.flags);
}
}
--
2.14.1
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