From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 24 Jul 2008 19:49:26 +0000 (-0700)
Subject: x86-64: make BUILD_IRQ() also reset section back
X-Git-Tag: v2.6.27-rc1~516
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6209ed9d8443b63c36d340908530fa470c4d4fff;p=platform%2Fupstream%2Fkernel-adaptation-pc.git

x86-64: make BUILD_IRQ() also reset section back

Commit 9d25d4db81833029d30b7b03cc1000cbbe09e192 ("x86: BUILD_IRQ say
.text to avoid .data.percpu") added a ".text" specifier to make sure
that BUILD_IRQ() builds the irq trampoline in the text segment rather
than in some random left-over segment that the compiler happened to
leave the asm in.

However, we should also make sure that we switch back by adding a
".previous" at the end, so that there are no subtle issues with
subsequent compiler-generated code.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index 9414125..1f26fd9 100644
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -46,7 +46,8 @@
 	asm("\n.text\n.p2align\n"		\
 	    "IRQ" #nr "_interrupt:\n\t"		\
 	    "push $~(" #nr ") ; "		\
-	    "jmp common_interrupt");
+	    "jmp common_interrupt\n"		\
+	    ".previous");
 
 #define BI(x,y) \
 	BUILD_IRQ(x##y)