[PATCH RESEND v4 3/4] x86/segment: Use ASM_INPUT_RM in __loadsegment_fs()

[Uros Bizjak]

Use the ASM_INPUT_RM macro in __loadsegment_fs() to work around clang
problems with "rm" asm constraint. clang seems to always chose the
memory input, while it is almost always the worst choice.

Signed-off-by: Uros Bizjak <ubizjak@xxxxxxxxx>
Acked-by: "Peter Zijlstra (Intel)" <peterz@xxxxxxxxxxxxx>
Acked-by: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Nick Desaulniers <nick.desaulniers+lkml@xxxxxxxxx>
Cc: Bill Wendling <morbo@xxxxxxxxxx>
Cc: Justin Stitt <justinstitt@xxxxxxxxxx>
---
 arch/x86/include/asm/segment.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/segment.h b/arch/x86/include/asm/segment.h
index 3fe3a310844c..0f4283dcd0c4 100644
--- a/arch/x86/include/asm/segment.h
+++ b/arch/x86/include/asm/segment.h
@@ -335,7 +335,7 @@ static inline void __loadsegment_fs(unsigned short value)
 
 		     _ASM_EXTABLE_TYPE(1b, 2b, EX_TYPE_CLEAR_FS)
 
-		     : : "rm" (value) : "memory");
+		     : : ASM_INPUT_RM (value) : "memory");
 }
 
 /* __loadsegment_gs is intentionally undefined.  Use load_gs_index instead. */
-- 
2.53.0