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| author |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2010-02-26 22:37:31 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-02-26 22:37:30 +0100 |
| commit | 987bcdacb18a3adc2a48d85c9b005069c2f4dd7b (patch) | |
| tree | 65da88589e2c95a4677090b570f49402e870e573 /arch/s390/include/asm/swab.h | |
| parent | [S390] cio: fix storage key handling (diff) | |
| download | linux-dev-987bcdacb18a3adc2a48d85c9b005069c2f4dd7b.tar.xz linux-dev-987bcdacb18a3adc2a48d85c9b005069c2f4dd7b.zip | |
[S390] use inline assembly contraints available with gcc 3.3.3
Drop support to compile the kernel with gcc versions older than 3.3.3.
This allows us to use the "Q" inline assembly contraint on some more
inline assemblies without duplicating a lot of complex code (e.g. __xchg
and __cmpxchg). The distinction for older gcc versions can be removed
which saves a few lines and simplifies the code.
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/swab.h')
| -rw-r--r-- | arch/s390/include/asm/swab.h | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/arch/s390/include/asm/swab.h b/arch/s390/include/asm/swab.h index eb18dc1f327b..6bdee21c077e 100644 --- a/arch/s390/include/asm/swab.h +++ b/arch/s390/include/asm/swab.h @@ -47,11 +47,11 @@ static inline __u32 __arch_swab32p(const __u32 *x) asm volatile( #ifndef __s390x__ - " icm %0,8,3(%1)\n" - " icm %0,4,2(%1)\n" - " icm %0,2,1(%1)\n" - " ic %0,0(%1)" - : "=&d" (result) : "a" (x), "m" (*x) : "cc"); + " icm %0,8,%O1+3(%R1)\n" + " icm %0,4,%O1+2(%R1)\n" + " icm %0,2,%O1+1(%R1)\n" + " ic %0,%1" + : "=&d" (result) : "Q" (*x) : "cc"); #else /* __s390x__ */ " lrv %0,%1" : "=d" (result) : "m" (*x)); @@ -77,9 +77,9 @@ static inline __u16 __arch_swab16p(const __u16 *x) asm volatile( #ifndef __s390x__ - " icm %0,2,1(%1)\n" - " ic %0,0(%1)\n" - : "=&d" (result) : "a" (x), "m" (*x) : "cc"); + " icm %0,2,%O+1(%R1)\n" + " ic %0,%1\n" + : "=&d" (result) : "Q" (*x) : "cc"); #else /* __s390x__ */ " lrvh %0,%1" : "=d" (result) : "m" (*x)); |