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authorJosh Triplett <josh@joshtriplett.org>2013-08-20 17:20:14 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-13 13:48:00 -0800
commit0e2d79ded075f612ba63178c6eaefe6ee7d8dd75 (patch)
treed1890cb2b292b33af6d2a371894c5fe10c1898d6 /drivers
parent73cb6cf10ef0ce902cb13b5bcb2c9c653e9a7798 (diff)
downloadlinaro-lsk-0e2d79ded075f612ba63178c6eaefe6ee7d8dd75.tar.gz
turbostat: Use GCC's CPUID functions to support PIC
commit 2b92865e648ce04a39fda4f903784a5d01ecb0dc upstream. turbostat uses inline assembly to call cpuid. On 32-bit x86, on systems that have certain security features enabled by default that make -fPIC the default, this causes a build error: turbostat.c: In function ‘check_cpuid’: turbostat.c:1906:2: error: PIC register clobbered by ‘ebx’ in ‘asm’ asm("cpuid" : "=a" (fms), "=c" (ecx), "=d" (edx) : "a" (1) : "ebx"); ^ GCC provides a header cpuid.h, containing a __get_cpuid function that works with both PIC and non-PIC. (On PIC, it saves and restores ebx around the cpuid instruction.) Use that instead. Signed-off-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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