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sparc64: Fill a missing delay slot.

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If the code were already aligned to 64 bytes, wr instruction would be executed
twice --- once in delay slot and once in the jump target.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mikulas Patocka 2010-08-19 14:15:32 -07:00 committed by David S. Miller
parent 0f58189d4a
commit 019408f9b8
1 changed files with 1 additions and 0 deletions
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arch/sparc/include/asm/system_64.h
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@ -106,6 +106,7 @@ do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \
*/ */
#define write_pic(__p) \ #define write_pic(__p) \
__asm__ __volatile__("ba,pt %%xcc, 99f\n\t" \ __asm__ __volatile__("ba,pt %%xcc, 99f\n\t" \
" nop\n\t" \
".align 64\n" \ ".align 64\n" \
"99:wr %0, 0x0, %%pic\n\t" \ "99:wr %0, 0x0, %%pic\n\t" \
"rd %%pic, %%g0" : : "r" (__p)) "rd %%pic, %%g0" : : "r" (__p))