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authorHaavard Skinnemoen <hskinnemoen@atmel.com>2006-10-24 10:12:42 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-25 20:26:33 -0700
commitfa3522407f01ead1ec14bdd6b785ea08d17d500d (patch)
treec4ddfb52859c9c304404ad010d927ed76a46f9a0 /include/asm-avr32
parentbee8ce809fb1c877388be032b468574a1cfff9ef (diff)
downloadop-kernel-dev-fa3522407f01ead1ec14bdd6b785ea08d17d500d.zip
op-kernel-dev-fa3522407f01ead1ec14bdd6b785ea08d17d500d.tar.gz
[PATCH] AVR32: Fix oversize immediates in atomic.h
When calling e.g. atomic_sub_return with a large constant, the compiler may output an immediate that is too large for the sub instruction in the middle of the loop. Fix this by explicitly specifying the number of bits allowed in the constraint. Also stop atomic_add_return() and friends from falling back to their respective "sub" variants if the constant is too large to fit in an immediate. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-avr32')
-rw-r--r--include/asm-avr32/atomic.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/include/asm-avr32/atomic.h b/include/asm-avr32/atomic.h
index e0b9c44..c40b603 100644
--- a/include/asm-avr32/atomic.h
+++ b/include/asm-avr32/atomic.h
@@ -41,7 +41,7 @@ static inline int atomic_sub_return(int i, atomic_t *v)
" stcond %1, %0\n"
" brne 1b"
: "=&r"(result), "=o"(v->counter)
- : "m"(v->counter), "ir"(i)
+ : "m"(v->counter), "rKs21"(i)
: "cc");
return result;
@@ -58,7 +58,7 @@ static inline int atomic_add_return(int i, atomic_t *v)
{
int result;
- if (__builtin_constant_p(i))
+ if (__builtin_constant_p(i) && (i >= -1048575) && (i <= 1048576))
result = atomic_sub_return(-i, v);
else
asm volatile(
@@ -101,7 +101,7 @@ static inline int atomic_sub_unless(atomic_t *v, int a, int u)
" mov %1, 1\n"
"1:"
: "=&r"(tmp), "=&r"(result), "=o"(v->counter)
- : "m"(v->counter), "ir"(a), "ir"(u)
+ : "m"(v->counter), "rKs21"(a), "rKs21"(u)
: "cc", "memory");
return result;
@@ -121,7 +121,7 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u)
{
int tmp, result;
- if (__builtin_constant_p(a))
+ if (__builtin_constant_p(a) && (a >= -1048575) && (a <= 1048576))
result = atomic_sub_unless(v, -a, u);
else {
result = 0;
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