Le mercredi 12 mai 2010 à 01:06 +0000, tip-bot for H. Peter Anvin a écrit : > Commit-ID: a3c8acd04376d604370dcb6cd2143c9c14078a50 > Gitweb: http://git.kernel.org/tip/a3c8acd04376d604370dcb6cd2143c9c14078a50 > Author: H. Peter Anvin <hpa@xxxxxxxxx> > AuthorDate: Tue, 11 May 2010 17:47:07 -0700 > Committer: H. Peter Anvin <hpa@xxxxxxxxx> > CommitDate: Tue, 11 May 2010 17:47:07 -0700 > > x86: Add new static_cpu_has() function using alternatives > > For CPU-feature-specific code that touches performance-critical paths, > introduce a static patching version of [boot_]cpu_has(). This is run > at alternatives time and is therefore not appropriate for most > initialization code, but on the other hand initialization code is > generally not performance critical. > > On gcc 4.5+ this uses the new "asm goto" feature. Might be time to change Documentation/Changes about gcc requirements ... # make CHK include/linux/version.h CHK include/generated/utsrelease.h CALL scripts/checksyscalls.sh CHK include/generated/compile.h CC arch/x86/kernel/process_32.o /usr/src/linux-2.6/arch/x86/include/asm/cpufeature.h: In function `prepare_to_copy': /usr/src/linux-2.6/arch/x86/include/asm/cpufeature.h:315: warning: asm operand 1 probably doesn't match constraints /usr/src/linux-2.6/arch/x86/include/asm/cpufeature.h:315: error: impossible constraint in `asm' /usr/src/linux-2.6/arch/x86/include/asm/cpufeature.h:313: warning: 'flag' might be used uninitialized in this function make[2]: *** [arch/x86/kernel/process_32.o] Error 1 make[1]: *** [arch/x86/kernel] Error 2 make: *** [arch/x86] Error 2 # gcc -v Reading specs from /usr/lib/gcc/i386-redhat-linux/3.4.6/specs Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-java-awt=gtk --host=i386-redhat-linux Thread model: posix gcc version 3.4.6 20060404 (Red Hat 3.4.6-10) -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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