From: H. Peter Anvin Date: Fri, 21 Sep 2012 19:43:08 +0000 (-0700) Subject: x86, alternative: Use .pushsection/.popsection X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=9cebed423c84a56b871327dd77e555d1d2186a6b;p=openwrt%2Fstaging%2Fblogic.git x86, alternative: Use .pushsection/.popsection .section/.previous doesn't nest. Use .pushsection/.popsection in so that they can be properly nested. Signed-off-by: H. Peter Anvin Link: http://lkml.kernel.org/r/1348256595-29119-5-git-send-email-hpa@linux.intel.com --- diff --git a/arch/x86/include/asm/alternative-asm.h b/arch/x86/include/asm/alternative-asm.h index 952bd0100c5c..018d29fe634a 100644 --- a/arch/x86/include/asm/alternative-asm.h +++ b/arch/x86/include/asm/alternative-asm.h @@ -5,10 +5,10 @@ #ifdef CONFIG_SMP .macro LOCK_PREFIX 672: lock - .section .smp_locks,"a" + .pushsection .smp_locks,"a" .balign 4 .long 672b - . - .previous + .popsection .endm #else .macro LOCK_PREFIX diff --git a/arch/x86/include/asm/alternative.h b/arch/x86/include/asm/alternative.h index 70780689599a..87bc00d4efe9 100644 --- a/arch/x86/include/asm/alternative.h +++ b/arch/x86/include/asm/alternative.h @@ -29,10 +29,10 @@ #ifdef CONFIG_SMP #define LOCK_PREFIX_HERE \ - ".section .smp_locks,\"a\"\n" \ - ".balign 4\n" \ - ".long 671f - .\n" /* offset */ \ - ".previous\n" \ + ".pushsection .smp_locks,\"a\"\n" \ + ".balign 4\n" \ + ".long 671f - .\n" /* offset */ \ + ".popsection\n" \ "671:" #define LOCK_PREFIX LOCK_PREFIX_HERE "\n\tlock; " @@ -99,30 +99,30 @@ static inline int alternatives_text_reserved(void *start, void *end) /* alternative assembly primitive: */ #define ALTERNATIVE(oldinstr, newinstr, feature) \ OLDINSTR(oldinstr) \ - ".section .altinstructions,\"a\"\n" \ + ".pushsection .altinstructions,\"a\"\n" \ ALTINSTR_ENTRY(feature, 1) \ - ".previous\n" \ - ".section .discard,\"aw\",@progbits\n" \ + ".popsection\n" \ + ".pushsection .discard,\"aw\",@progbits\n" \ DISCARD_ENTRY(1) \ - ".previous\n" \ - ".section .altinstr_replacement, \"ax\"\n" \ + ".popsection\n" \ + ".pushsection .altinstr_replacement, \"ax\"\n" \ ALTINSTR_REPLACEMENT(newinstr, feature, 1) \ - ".previous" + ".popsection" #define ALTERNATIVE_2(oldinstr, newinstr1, feature1, newinstr2, feature2)\ OLDINSTR(oldinstr) \ - ".section .altinstructions,\"a\"\n" \ + ".pushsection .altinstructions,\"a\"\n" \ ALTINSTR_ENTRY(feature1, 1) \ ALTINSTR_ENTRY(feature2, 2) \ - ".previous\n" \ - ".section .discard,\"aw\",@progbits\n" \ + ".popsection\n" \ + ".pushsection .discard,\"aw\",@progbits\n" \ DISCARD_ENTRY(1) \ DISCARD_ENTRY(2) \ - ".previous\n" \ - ".section .altinstr_replacement, \"ax\"\n" \ + ".popsection\n" \ + ".pushsection .altinstr_replacement, \"ax\"\n" \ ALTINSTR_REPLACEMENT(newinstr1, feature1, 1) \ ALTINSTR_REPLACEMENT(newinstr2, feature2, 2) \ - ".previous" + ".popsection" /* * This must be included *after* the definition of ALTERNATIVE due to