x86, extable: Remove open-coded exception table entries in arch/x86/lib/copy_user_64.S

Remove open-coded exception table entries in arch/x86/lib/copy_user_64.S,
and replace them with _ASM_EXTABLE() macros; this will allow us to
change the format and type of the exception table entries.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: David Daney <david.daney@cavium.com>
Link: http://lkml.kernel.org/r/CA%2B55aFyijf43qSu3N9nWHEBwaGbb7T2Oq9A=9EyR=Jtyqfq_cQ@mail.gmail.com

diff --git a/arch/x86/lib/copy_user_64.S b/arch/x86/lib/copy_user_64.S
index 024840266ba0d94144697de13194417d0427d22f..5b2995f4557a8c6e8d38ba4461db8d5e34c983c6 100644 (file)
--- a/arch/x86/lib/copy_user_64.S
+++ b/arch/x86/lib/copy_user_64.S
@@ -16,6 +16,7 @@
 #include <asm/thread_info.h>
 #include <asm/cpufeature.h>
 #include <asm/alternative-asm.h>
+#include <asm/asm.h>
 
 /*
  * By placing feature2 after feature1 in altinstructions section, we logically
@@ -63,11 +64,8 @@
        jmp copy_user_handle_tail
        .previous
 
-       .section __ex_table,"a"
-       .align 8
-       .quad 100b,103b
-       .quad 101b,103b
-       .previous
+       _ASM_EXTABLE(100b,103b)
+       _ASM_EXTABLE(101b,103b)
 #endif
        .endm
 
@@ -191,29 +189,26 @@ ENTRY(copy_user_generic_unrolled)
 60:    jmp copy_user_handle_tail /* ecx is zerorest also */
        .previous
 
-       .section __ex_table,"a"
-       .align 8
-       .quad 1b,30b
-       .quad 2b,30b
-       .quad 3b,30b
-       .quad 4b,30b
-       .quad 5b,30b
-       .quad 6b,30b
-       .quad 7b,30b
-       .quad 8b,30b
-       .quad 9b,30b
-       .quad 10b,30b
-       .quad 11b,30b
-       .quad 12b,30b
-       .quad 13b,30b
-       .quad 14b,30b
-       .quad 15b,30b
-       .quad 16b,30b
-       .quad 18b,40b
-       .quad 19b,40b
-       .quad 21b,50b
-       .quad 22b,50b
-       .previous
+       _ASM_EXTABLE(1b,30b)
+       _ASM_EXTABLE(2b,30b)
+       _ASM_EXTABLE(3b,30b)
+       _ASM_EXTABLE(4b,30b)
+       _ASM_EXTABLE(5b,30b)
+       _ASM_EXTABLE(6b,30b)
+       _ASM_EXTABLE(7b,30b)
+       _ASM_EXTABLE(8b,30b)
+       _ASM_EXTABLE(9b,30b)
+       _ASM_EXTABLE(10b,30b)
+       _ASM_EXTABLE(11b,30b)
+       _ASM_EXTABLE(12b,30b)
+       _ASM_EXTABLE(13b,30b)
+       _ASM_EXTABLE(14b,30b)
+       _ASM_EXTABLE(15b,30b)
+       _ASM_EXTABLE(16b,30b)
+       _ASM_EXTABLE(18b,40b)
+       _ASM_EXTABLE(19b,40b)
+       _ASM_EXTABLE(21b,50b)
+       _ASM_EXTABLE(22b,50b)
        CFI_ENDPROC
 ENDPROC(copy_user_generic_unrolled)
 
@@ -259,11 +254,8 @@ ENTRY(copy_user_generic_string)
        jmp copy_user_handle_tail
        .previous
 
-       .section __ex_table,"a"
-       .align 8
-       .quad 1b,11b
-       .quad 3b,12b
-       .previous
+       _ASM_EXTABLE(1b,11b)
+       _ASM_EXTABLE(3b,12b)
        CFI_ENDPROC
 ENDPROC(copy_user_generic_string)
 
@@ -294,9 +286,6 @@ ENTRY(copy_user_enhanced_fast_string)
        jmp copy_user_handle_tail
        .previous
 
-       .section __ex_table,"a"
-       .align 8
-       .quad 1b,12b
-       .previous
+       _ASM_EXTABLE(1b,12b)
        CFI_ENDPROC
 ENDPROC(copy_user_enhanced_fast_string)