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
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@ -782,7 +782,7 @@ _ASM_NOKPROBE(common_interrupt_return)
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/*
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* Reload gs selector with exception handling
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* edi: new selector
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* di: new selector
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*
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* Is in entry.text as it shouldn't be instrumented.
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*/
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@ -120,7 +120,7 @@ static inline void native_wbinvd(void)
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asm volatile("wbinvd": : :"memory");
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}
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extern asmlinkage void asm_load_gs_index(unsigned int selector);
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extern asmlinkage void asm_load_gs_index(u16 selector);
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static inline void native_load_gs_index(unsigned int selector)
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{
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