[Xen-changelog] [xen staging] x86: move quoting of __ASM_{STAC, CLAC}

[patchbot@xxxxxxx]

commit 645a2ff8187eb3c77490ce8206f5254b0bdfbabf
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Wed Aug 29 16:31:32 2018 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Aug 29 16:31:32 2018 +0200

    x86: move quoting of __ASM_{STAC,CLAC}
    
    Both consumers want them quoted, so quote them right away instead of
    using __stringify() upon use. In the spirit of other recent additions
    also make the assembly forms assembler macros, allowing the helper
    #define-s to be #undef-ed subsequently.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/include/asm-x86/asm_defns.h | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/xen/include/asm-x86/asm_defns.h b/xen/include/asm-x86/asm_defns.h
index e0096834e6..89a0fb41a2 100644
--- a/xen/include/asm-x86/asm_defns.h
+++ b/xen/include/asm-x86/asm_defns.h
@@ -189,26 +189,33 @@ void ret_from_intr(void);
 #endif
 
 /* "Raw" instruction opcodes */
-#define __ASM_CLAC      .byte 0x0f,0x01,0xca
-#define __ASM_STAC      .byte 0x0f,0x01,0xcb
+#define __ASM_CLAC      ".byte 0x0f,0x01,0xca"
+#define __ASM_STAC      ".byte 0x0f,0x01,0xcb"
 
 #ifdef __ASSEMBLY__
-#define ASM_STAC ALTERNATIVE "", __stringify(__ASM_STAC), X86_FEATURE_XEN_SMAP
-#define ASM_CLAC ALTERNATIVE "", __stringify(__ASM_CLAC), X86_FEATURE_XEN_SMAP
+.macro ASM_STAC
+    ALTERNATIVE "", __ASM_STAC, X86_FEATURE_XEN_SMAP
+.endm
+.macro ASM_CLAC
+    ALTERNATIVE "", __ASM_CLAC, X86_FEATURE_XEN_SMAP
+.endm
 #else
 static always_inline void clac(void)
 {
     /* Note: a barrier is implicit in alternative() */
-    alternative("", __stringify(__ASM_CLAC), X86_FEATURE_XEN_SMAP);
+    alternative("", __ASM_CLAC, X86_FEATURE_XEN_SMAP);
 }
 
 static always_inline void stac(void)
 {
     /* Note: a barrier is implicit in alternative() */
-    alternative("", __stringify(__ASM_STAC), X86_FEATURE_XEN_SMAP);
+    alternative("", __ASM_STAC, X86_FEATURE_XEN_SMAP);
 }
 #endif
 
+#undef __ASM_STAC
+#undef __ASM_CLAC
+
 #ifdef __ASSEMBLY__
 .macro SAVE_ALL op, compat=0
 .ifeqs "\op", "CLAC"
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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