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Subject[REVIEW][PATCH 12/20] signal/x86: Remove pkey parameter from bad_area_nosemaphore
The function bad_area_nosemaphore always sets si_code to SEGV_MAPERR
and as such can never return a pkey parameter. Therefore remove the
unusable pkey parameter from bad_area_nosemaphore.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
arch/x86/mm/fault.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 4112b05d0dec..cfc88920716f 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -897,9 +897,9 @@ __bad_area_nosemaphore(struct pt_regs *regs, unsigned long error_code,

static noinline void
bad_area_nosemaphore(struct pt_regs *regs, unsigned long error_code,
- unsigned long address, u32 *pkey)
+ unsigned long address)
{
- __bad_area_nosemaphore(regs, error_code, address, pkey, SEGV_MAPERR);
+ __bad_area_nosemaphore(regs, error_code, address, NULL, SEGV_MAPERR);
}

static void
@@ -1025,7 +1025,7 @@ mm_fault_error(struct pt_regs *regs, unsigned long error_code,
VM_FAULT_HWPOISON_LARGE))
do_sigbus(regs, error_code, address, pkey, fault);
else if (fault & VM_FAULT_SIGSEGV)
- bad_area_nosemaphore(regs, error_code, address, pkey);
+ bad_area_nosemaphore(regs, error_code, address);
else
BUG();
}
@@ -1255,7 +1255,7 @@ __do_page_fault(struct pt_regs *regs, unsigned long error_code,
* Don't take the mm semaphore here. If we fixup a prefetch
* fault we could otherwise deadlock:
*/
- bad_area_nosemaphore(regs, error_code, address, NULL);
+ bad_area_nosemaphore(regs, error_code, address);

return;
}
@@ -1268,7 +1268,7 @@ __do_page_fault(struct pt_regs *regs, unsigned long error_code,
pgtable_bad(regs, error_code, address);

if (unlikely(smap_violation(error_code, regs))) {
- bad_area_nosemaphore(regs, error_code, address, NULL);
+ bad_area_nosemaphore(regs, error_code, address);
return;
}

@@ -1277,7 +1277,7 @@ __do_page_fault(struct pt_regs *regs, unsigned long error_code,
* in a region with pagefaults disabled then we must not take the fault
*/
if (unlikely(faulthandler_disabled() || !mm)) {
- bad_area_nosemaphore(regs, error_code, address, NULL);
+ bad_area_nosemaphore(regs, error_code, address);
return;
}

@@ -1323,7 +1323,7 @@ __do_page_fault(struct pt_regs *regs, unsigned long error_code,
if (unlikely(!down_read_trylock(&mm->mmap_sem))) {
if (!(error_code & X86_PF_USER) &&
!search_exception_tables(regs->ip)) {
- bad_area_nosemaphore(regs, error_code, address, NULL);
+ bad_area_nosemaphore(regs, error_code, address);
return;
}
retry:
--
2.17.1
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