[PATCH 06/20] kasan: remove __kasan_unpoison_stack

From: Andrey Konovalov
Date: Wed Nov 04 2020 - 19:02:53 EST


There's no need for __kasan_unpoison_stack() helper, as it's only
currently used in a single place. Removing it also removes unneeded
arithmetic.

No functional changes.

Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Reviewed-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Link: https://linux-review.googlesource.com/id/Ie5ba549d445292fe629b4a96735e4034957bcc50
---
mm/kasan/common.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index a3e67d49b893..9008fc6b0810 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -59,18 +59,12 @@ void kasan_disable_current(void)
#endif /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */

#if CONFIG_KASAN_STACK
-static void __kasan_unpoison_stack(struct task_struct *task, const void *sp)
-{
- void *base = task_stack_page(task);
- size_t size = sp - base;
-
- kasan_unpoison_memory(base, size);
-}
-
/* Unpoison the entire stack for a task. */
void kasan_unpoison_task_stack(struct task_struct *task)
{
- __kasan_unpoison_stack(task, task_stack_page(task) + THREAD_SIZE);
+ void *base = task_stack_page(task);
+
+ kasan_unpoison_memory(base, THREAD_SIZE);
}

/* Unpoison the stack for the current task beyond a watermark sp value. */
--
2.29.1.341.ge80a0c044ae-goog