diff options
| author |   Heiko Carstens <hca@linux.ibm.com> | 2022-05-11 14:05:25 +0200 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2022-05-17 15:16:28 +0200 |
| commit | fad442d3abde47aef97d0d822807ab6e2555784a (patch) | |
| tree | 1a15fda279e1cad21a742e494437b06ddc93714b /arch/s390/lib/spinlock.c | |
| parent | s390/cpumf: add new extended counter set for IBM z16 (diff) | |
| download | linux-dev-fad442d3abde47aef97d0d822807ab6e2555784a.tar.xz linux-dev-fad442d3abde47aef97d0d822807ab6e2555784a.zip | |
s390/alternatives: provide identical sized orginal/alternative sequences
Explicitly provide identical sized original/alternative instruction
sequences. This way there is no need for the s390 specific alternatives
infrastructure to generate padding sequences.
The code which generates such sequences will be removed with a follow on
patch.
Acked-by: Vasily Gorbik <gor@linux.ibm.com>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20220511120532.2228616-2-hca@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/s390/lib/spinlock.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/lib/spinlock.c b/arch/s390/lib/spinlock.c index 5e7ea8b111e8..04d4c6cf898e 100644 --- a/arch/s390/lib/spinlock.c +++ b/arch/s390/lib/spinlock.c @@ -75,7 +75,7 @@ static inline int arch_load_niai4(int *lock) int owner; asm_inline volatile( - ALTERNATIVE("", ".insn rre,0xb2fa0000,4,0", 49) /* NIAI 4 */ + ALTERNATIVE("nop", ".insn rre,0xb2fa0000,4,0", 49) /* NIAI 4 */ " l %0,%1\n" : "=d" (owner) : "Q" (*lock) : "memory"); return owner; @@ -86,7 +86,7 @@ static inline int arch_cmpxchg_niai8(int *lock, int old, int new) int expected = old; asm_inline volatile( - ALTERNATIVE("", ".insn rre,0xb2fa0000,8,0", 49) /* NIAI 8 */ + ALTERNATIVE("nop", ".insn rre,0xb2fa0000,8,0", 49) /* NIAI 8 */ " cs %0,%3,%1\n" : "=d" (old), "=Q" (*lock) : "0" (old), "d" (new), "Q" (*lock) |