leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

signal/x86: Remove pkey parameter from bad_area_nosemaphore

Browse Source 
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.

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2018-09-18 00:13:13 +02:00
parent 164881b614
commit 768fd9c69b
1 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
arch/x86/mm/fault.c
View File

@ -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
@ -1026,7 +1026,7 @@ 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();
}
@ -1256,7 +1256,7 @@ __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;
}
@ -1269,7 +1269,7 @@ __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;
}
@ -1278,7 +1278,7 @@ __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;
}
@ -1324,7 +1324,7 @@ __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: