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authorPeter Zijlstra <peterz@infradead.org>2020-04-01 17:51:11 +0300
committerIngo Molnar <mingo@kernel.org>2020-04-22 11:53:50 +0300
commit9f2dfd61dd022d4559d42a832fb03e76aad36c5f (patch)
tree911e5d0f266368063710de91316e4fef732d84c5 /tools/arch
parentdc2745b61907cf6faeb72cc25f2cc4b38d4a3cac (diff)
downloadlinux-9f2dfd61dd022d4559d42a832fb03e76aad36c5f.tar.xz
x86,ftrace: Shrink ftrace_regs_caller() by one byte
'Optimize' ftrace_regs_caller. Instead of comparing against an immediate, the more natural way to test for zero on x86 is: 'test %r,%r'. 48 83 f8 00 cmp $0x0,%rax 74 49 je 226 <ftrace_regs_call+0xa3> 48 85 c0 test %rax,%rax 74 49 je 225 <ftrace_regs_call+0xa2> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Miroslav Benes <mbenes@suse.cz> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Link: https://lkml.kernel.org/r/20200416115118.867411350@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
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