x86_64: Work around old GAS bug

GAS in binutils(2.16.91) could not parse parentheses within
macro parameters unless fully parenthesized, and this is a
workaround to make old gas work without generating below errors:

 arch/x86/kernel/entry_64.S: Assembler messages:
 arch/x86/kernel/entry_64.S:387: Error: too many positional arguments
 arch/x86/kernel/entry_64.S:389: Error: too many positional arguments
 [...]

Signed-off-by: Tao Guo <glorioustao@gmail.com>
Reluctantly-Acked-by: Jan Beulich <jbeulich@novell.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/1348648102-12653-1-git-send-email-glorioustao@gmail.com
[ Jan argues that these old GAS versions are fragile - which is so, but lets give them a chance. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 10 insertions, 10 deletions

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index b1dac12dc5e6..2c6706167c8d 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -342,15 +342,15 @@ ENDPROC(native_usergs_sysret64)
         .macro SAVE_ARGS_IRQ
         cld
         /* start from rbp in pt_regs and jump over */
-        movq_cfi rdi, RDI-RBP
-        movq_cfi rsi, RSI-RBP
-        movq_cfi rdx, RDX-RBP
-        movq_cfi rcx, RCX-RBP
-        movq_cfi rax, RAX-RBP
-        movq_cfi  r8,  R8-RBP
-        movq_cfi  r9,  R9-RBP
-        movq_cfi r10, R10-RBP
-        movq_cfi r11, R11-RBP
+        movq_cfi rdi, (RDI-RBP)
+        movq_cfi rsi, (RSI-RBP)
+        movq_cfi rdx, (RDX-RBP)
+        movq_cfi rcx, (RCX-RBP)
+        movq_cfi rax, (RAX-RBP)
+        movq_cfi  r8,  (R8-RBP)
+        movq_cfi  r9,  (R9-RBP)
+        movq_cfi r10, (R10-RBP)
+        movq_cfi r11, (R11-RBP)
 
         /* Save rbp so that we can unwind from get_irq_regs() */
         movq_cfi rbp, 0
@@ -384,7 +384,7 @@ ENDPROC(native_usergs_sysret64)
         .endm
 
 ENTRY(save_rest)
-        PARTIAL_FRAME 1 REST_SKIP+8
+        PARTIAL_FRAME 1 (REST_SKIP+8)
         movq 5*8+16(%rsp), %r11 /* save return address */
         movq_cfi rbx, RBX+16
         movq_cfi rbp, RBP+16