Commit dc2745b6 authored Apr 01, 2020 by Peter Zijlstra Committed by Ingo Molnar Apr 22, 2020

x86,ftrace: Use SIZEOF_PTREGS



There's a convenient macro for 'SS+8' called FRAME_SIZE. Use it to
clarify things.

(entry/calling.h calls this SIZEOF_PTREGS but we're using
asm/ptrace-abi.h)

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/20200416115118.808485515@infradead.org


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 0298739b

arch/x86/kernel/ftrace_64.S

+2 −2

Original line number	Diff line number	Diff line
		@@ -23,7 +23,7 @@
		#endif /* CONFIG_FRAME_POINTER */

		/* Size of stack used to save mcount regs in save_mcount_regs */
		#define MCOUNT_REG_SIZE (SS+8 + MCOUNT_FRAME_SIZE)
		#define MCOUNT_REG_SIZE (FRAME_SIZE + MCOUNT_FRAME_SIZE)

		/*
		* gcc -pg option adds a call to 'mcount' in most functions.
		@@ -77,7 +77,7 @@
		/*
		* We add enough stack to save all regs.
		*/
		subq $(MCOUNT_REG_SIZE - MCOUNT_FRAME_SIZE), %rsp
		subq $(FRAME_SIZE), %rsp
		movq %rax, RAX(%rsp)
		movq %rcx, RCX(%rsp)
		movq %rdx, RDX(%rsp)