diff options
| author | H. Peter Anvin (Intel) <hpa@zytor.com> | 2023-01-11 23:20:30 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-01-12 13:06:36 +0100 |
| commit | df729fb05ae2db52f7de150439392a88ee9d9b4f (patch) | |
| tree | e7ae35a5881c8d7d2bbd31e8a23b5252b1fc3c24 /arch/x86/include/asm/special_insns.h | |
| parent | 5a91f12660fe7249e37b11372bf599e02b6a319c (diff) | |
x86/gsseg: Make asm_load_gs_index() take an u16
Let GCC know that only the low 16 bits of load_gs_index() argument
actually matter. It might allow it to create slightly better
code. However, do not propagate this into the prototypes of functions
that end up being paravirtualized, to avoid unnecessary changes.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Signed-off-by: Xin Li <xin3.li@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230112072032.35626-4-xin3.li@intel.com
Diffstat (limited to 'arch/x86/include/asm/special_insns.h')
| -rw-r--r-- | arch/x86/include/asm/special_insns.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/special_insns.h b/arch/x86/include/asm/special_insns.h index 35f709f619fb..a71d0e8d4684 100644 --- a/arch/x86/include/asm/special_insns.h +++ b/arch/x86/include/asm/special_insns.h @@ -120,7 +120,7 @@ static inline void native_wbinvd(void) asm volatile("wbinvd": : :"memory"); } -extern asmlinkage void asm_load_gs_index(unsigned int selector); +extern asmlinkage void asm_load_gs_index(u16 selector); static inline void native_load_gs_index(unsigned int selector) { |