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signal/x86: Pass pkey by value

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Now that si_code == SEGV_PKUERR is the flag indicating that a pkey
is present there is no longer a need to pass a pointer to a local
pkey value, instead pkey can be passed more efficiently by value.

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2018-09-21 15:27:32 +02:00
parent b4fd52f25c
commit 419ceeb128
1 changed files with 7 additions and 7 deletions
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14
arch/x86/mm/fault.c
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@ -769,7 +769,7 @@ show_signal_msg(struct pt_regs *regs, unsigned long error_code,
static void
__bad_area_nosemaphore(struct pt_regs *regs, unsigned long error_code,
unsigned long address, u32 *pkey, int si_code)
unsigned long address, u32 pkey, int si_code)
{
struct task_struct *tsk = current;
@ -818,7 +818,7 @@ __bad_area_nosemaphore(struct pt_regs *regs, unsigned long error_code,
tsk->thread.trap_nr = X86_TRAP_PF;
if (si_code == SEGV_PKUERR)
force_sig_pkuerr((void __user *)address, *pkey);
force_sig_pkuerr((void __user *)address, pkey);
force_sig_fault(SIGSEGV, si_code, (void __user *)address, tsk);
@ -835,12 +835,12 @@ static noinline void
bad_area_nosemaphore(struct pt_regs *regs, unsigned long error_code,
unsigned long address)
{
__bad_area_nosemaphore(regs, error_code, address, NULL, SEGV_MAPERR);
__bad_area_nosemaphore(regs, error_code, address, 0, SEGV_MAPERR);
}
static void
__bad_area(struct pt_regs *regs, unsigned long error_code,
unsigned long address, u32 *pkey, int si_code)
unsigned long address, u32 pkey, int si_code)
{
struct mm_struct *mm = current->mm;
/*
@ -855,7 +855,7 @@ __bad_area(struct pt_regs *regs, unsigned long error_code,
static noinline void
bad_area(struct pt_regs *regs, unsigned long error_code, unsigned long address)
{
__bad_area(regs, error_code, address, NULL, SEGV_MAPERR);
__bad_area(regs, error_code, address, 0, SEGV_MAPERR);
}
static inline bool bad_area_access_from_pkeys(unsigned long error_code,
@ -907,9 +907,9 @@ bad_area_access_error(struct pt_regs *regs, unsigned long error_code,
*/
u32 pkey = vma_pkey(vma);
__bad_area(regs, error_code, address, &pkey, SEGV_PKUERR);
__bad_area(regs, error_code, address, pkey, SEGV_PKUERR);
} else {
__bad_area(regs, error_code, address, NULL, SEGV_ACCERR);
__bad_area(regs, error_code, address, 0, SEGV_ACCERR);
}
}