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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>
Cc: stable@vger.kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
2b92865e64