diff options
| author | Heiko Carstens <hca@linux.ibm.com> | 2025-03-10 10:33:43 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2025-03-18 17:13:05 +0100 |
| commit | df4623fb53c2014e39a07801dd2ac49cb8701f44 (patch) | |
| tree | 28e5d4cf6b911323971348427845d385fd121bc4 | |
| parent | a0f2a8d05152512633b256459e9aceb7e588f372 (diff) | |
s390/lowcore: Use lghi instead llilh to clear register
lghi is the fastest way to clear a register. Use that intead of llilh.
Suggested-by: Juergen Christ <jchrist@linux.ibm.com>
Reviewed-by: Juergen Christ <jchrist@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
| -rw-r--r-- | arch/s390/include/asm/lowcore.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h index ada93ab7802a..1a31f1f93ed3 100644 --- a/arch/s390/include/asm/lowcore.h +++ b/arch/s390/include/asm/lowcore.h @@ -224,7 +224,7 @@ static __always_inline struct lowcore *get_lowcore(void) if (__is_defined(__DECOMPRESSOR)) return NULL; asm_inline( - ALTERNATIVE(" llilh %[lc],0", + ALTERNATIVE(" lghi %[lc],0", " llilh %[lc],%[alt]", ALT_FEATURE(MFEATURE_LOWCORE)) : [lc] "=d" (lc) @@ -242,7 +242,7 @@ static inline void set_prefix(__u32 address) #else /* __ASSEMBLY__ */ .macro GET_LC reg - ALTERNATIVE "llilh \reg,0", \ + ALTERNATIVE "lghi \reg,0", \ __stringify(llilh \reg, LOWCORE_ALT_ADDRESS >> 16), \ ALT_FEATURE(MFEATURE_LOWCORE) .endm |