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arm64: unwind: remove sp from struct stackframe

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The unwind code sets the sp member of struct stackframe to
'frame pointer + 0x10' unconditionally, without regard for whether
doing so produces a legal value. So let's simply remove it now that
we have stopped using it anyway.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Ard Biesheuvel
2017-07-23 09:05:38 +01:00
committed by Mark Rutland
parent 7326749801
commit 31e43ad3b7
7 changed files with 1 additions and 14 deletions
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arch/arm64/include/asm/stacktrace.h
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@@ -20,7 +20,6 @@ struct task_struct;
struct stackframe {
unsigned long fp;
unsigned long sp;
unsigned long pc;
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
unsigned int graph;