x86, asm: Make _ASM_EXTABLE() usable from assembly code

We have had this convenient macro _ASM_EXTABLE() to generate exception
table entry in inline assembly.  Make it also usable for pure
assembly.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h
index 56be78f..b3ed1e1 100644 (file)
--- a/arch/x86/include/asm/asm.h
+++ b/arch/x86/include/asm/asm.h
@@ -3,7 +3,7 @@
 
 #ifdef __ASSEMBLY__
 # define __ASM_FORM(x) x
-# define __ASM_EX_SEC  .section __ex_table
+# define __ASM_EX_SEC  .section __ex_table, "a"
 #else
 # define __ASM_FORM(x) " " #x " "
 # define __ASM_EX_SEC  " .section __ex_table,\"a\"\n"
@@ -38,10 +38,18 @@
 #define _ASM_DI                __ASM_REG(di)
 
 /* Exception table entry */
+#ifdef __ASSEMBLY__
+# define _ASM_EXTABLE(from,to)     \
+       __ASM_EX_SEC ;              \
+       _ASM_ALIGN ;                \
+       _ASM_PTR from , to ;        \
+       .previous
+#else
 # define _ASM_EXTABLE(from,to) \
        __ASM_EX_SEC    \
        _ASM_ALIGN "\n" \
        _ASM_PTR #from "," #to "\n" \
        " .previous\n"
+#endif
 
 #endif /* _ASM_X86_ASM_H */