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x86: use limited register constraint for setnz

Browse Source 
Impact: build fix with certain compilers

GCC can decide to use %dil when "r" is used, which is not valid for
setnz.

This bug was brought out by Stephen Rothwell's merging of the
branch tracer into linux-next.

[ Thanks to Uros Bizjak for recommending 'q' over 'Q' ]

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Steven Rostedt
2008-11-25 00:42:37 -05:00
committed by Ingo Molnar
parent 86bbc2c235
commit 5cf02b7baf
1 changed files with 1 additions and 1 deletions
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arch/x86/boot/tty.c
+1 -1
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@@ -74,7 +74,7 @@ static int kbd_pending(void)
{
u8 pending;
asm volatile("int $0x16; setnz %0"
: "=rm" (pending)
: "=qm" (pending)
: "a" (0x0100));
return pending;
}