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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2011-01-07 14:48:57 +1100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2011-01-07 14:48:57 +1100 |
| commit | 0735ac1f2551d9f9d356126aaf3b1110150918e6 (patch) | |
| tree | 4be8cf2b220bcd51053da2f67101f6ca4ceaf1aa /drivers/char | |
| parent | dffa18449a334cf436c1fabfb2fcf7d4240c994b (diff) | |
| download | linux-0735ac1f2551d9f9d356126aaf3b1110150918e6.tar.gz linux-0735ac1f2551d9f9d356126aaf3b1110150918e6.tar.bz2 linux-0735ac1f2551d9f9d356126aaf3b1110150918e6.zip | |
hwrng: via_rng - Fix asm constraints
The inline asm to invoke xstore did not specify the constraints
correctly. In particular, dx/di should have been marked as output
registers as well as input as they're modified by xstore.
Thanks to Mario Holbe for creating this patch and testing it.
Tested-by: Mario 'BitKoenig' Holbe <Mario.Holbe@TU-Ilmenau.DE>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/hw_random/via-rng.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/char/hw_random/via-rng.c b/drivers/char/hw_random/via-rng.c index 794aacb715c1..7f86666bb393 100644 --- a/drivers/char/hw_random/via-rng.c +++ b/drivers/char/hw_random/via-rng.c @@ -81,8 +81,7 @@ static inline u32 xstore(u32 *addr, u32 edx_in) ts_state = irq_ts_save(); asm(".byte 0x0F,0xA7,0xC0 /* xstore %%edi (addr=%0) */" - :"=m"(*addr), "=a"(eax_out) - :"D"(addr), "d"(edx_in)); + : "=m" (*addr), "=a" (eax_out), "+d" (edx_in), "+D" (addr)); irq_ts_restore(ts_state); return eax_out; |