x86, mm: fault.c, use printk_once() in is_errata93()

Andrew pointed out that the 'once' variable has a needlessly
function-global scope. We can in fact eliminate it completely,
via the use of printk_once().

[ Impact: cleanup ]

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 24a36a6..b9ca6d7 100644 (file)
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -514,8 +514,6 @@ bad:
 static int is_errata93(struct pt_regs *regs, unsigned long address)
 {
 #ifdef CONFIG_X86_64
-       static int once;
-
        if (address != regs->ip)
                return 0;
 
@@ -525,10 +523,7 @@ static int is_errata93(struct pt_regs *regs, unsigned long address)
        address |= 0xffffffffUL << 32;
        if ((address >= (u64)_stext && address <= (u64)_etext) ||
            (address >= MODULES_VADDR && address <= MODULES_END)) {
-               if (!once) {
-                       printk(errata93_warning);
-                       once = 1;
-               }
+               printk_once(errata93_warning);
                regs->ip = address;
                return 1;
        }