diff options
| author | Mark Rutland <mark.rutland@arm.com> | 2022-11-17 12:09:01 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-11-18 14:36:47 +0000 |
| commit | c8c384d7b397991584de4ed074541a54809cdd52 (patch) | |
| tree | 8b1dbba0fe30def2463cd31e7da2e42e203ba96a | |
| parent | f0c4d9fc9cc9462659728d168387191387e903cc (diff) | |
arm64: remove current_top_of_stack()
We no longer use current_top_of_stack() on arm64, so it can be removed.
We introduced current_top_of_stack() for STACKLEAK in commit:
0b3e336601b82c6a ("arm64: Add support for STACKLEAK gcc plugin")
... then we figured out the intended semantics were unclear, and
reworked it in commit:
e85094c31ddb794a ("arm64: stackleak: fix current_top_of_stack()")
... then we removed the only user in commit:
0cfa2ccd285d98ad ("stackleak: rework stack high bound handling")
Given that it's no longer used, and it's very easy to misuse, this patch
removes current_top_of_stack(). For the moment, on_thread_stack() is
left where it is as moving it will change some header dependencies.
There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20221117120902.3974163-2-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
| -rw-r--r-- | arch/arm64/include/asm/processor.h | 11 |
1 files changed, 0 insertions, 11 deletions
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index 445aa3af3b76..cf4eefaacafc 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -396,17 +396,6 @@ long get_tagged_addr_ctrl(struct task_struct *task); #define GET_TAGGED_ADDR_CTRL() get_tagged_addr_ctrl(current) #endif -/* - * For CONFIG_GCC_PLUGIN_STACKLEAK - * - * These need to be macros because otherwise we get stuck in a nightmare - * of header definitions for the use of task_stack_page. - */ - -/* - * The top of the current task's task stack - */ -#define current_top_of_stack() ((unsigned long)current->stack + THREAD_SIZE) #define on_thread_stack() (on_task_stack(current, current_stack_pointer, 1)) #endif /* __ASSEMBLY__ */ |