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    SubjectRe: [PATCH 19/27] perf tools: Introduce regs_query_register_offset() for x86
    Em Sun, Sep 06, 2015 at 07:13:35AM +0000, Wang Nan escreveu:
    > regs_query_register_offset() is a helper function which converts
    > register name like "%rax" to offset of a register in 'struct pt_regs',
    > which is required by BPF prologue generator. Since the function is
    > identical, try to reuse the code in arch/x86/kernel/ptrace.c.
    >
    > Comment inside dwarf-regs.c list the differences between this
    > implementation and kernel code.
    >
    > get_arch_regstr() switches to regoffset_table and the old string table
    > is dropped.

    Trying to cherry pick this one, but found this problem, trying to fix by
    adding the prototype somewhere...


    [acme@zoo linux]$ m
    make: Entering directory '/home/git/linux/tools/perf'
    BUILD: Doing 'make -j4' parallel build
    CC /tmp/build/perf/arch/x86/util/dwarf-regs.o
    CC /tmp/build/perf/arch/x86/util/intel-pt.o
    arch/x86/util/dwarf-regs.c:122:5: error: no previous prototype for
    ‘regs_query_register_offset’ [-Werror=missing-prototypes]
    int regs_query_register_offset(const char *name)
    ^
    cc1: all warnings being treated as errors
    /home/git/linux/tools/build/Makefile.build:70: recipe for target
    '/tmp/build/perf/arch/x86/util/dwarf-regs.o' failed
    make[5]: *** [/tmp/build/perf/arch/x86/util/dwarf-regs.o] Error 1



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