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    Subject[PATCH mm v4 06/19] kasan: remove __kasan_unpoison_stack
    From
    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@google.com>
    Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
    Reviewed-by: Marco Elver <elver@google.com>
    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 7648a2452a01..fabd843eff3d 100644
    --- a/mm/kasan/common.c
    +++ b/mm/kasan/common.c
    @@ -65,18 +65,12 @@ void kasan_unpoison_range(const void *address, size_t size)
    }

    #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;
    -
    - unpoison_range(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);
    +
    + unpoison_range(base, THREAD_SIZE);
    }

    /* Unpoison the stack for the current task beyond a watermark sp value. */
    --
    2.29.2.454.gaff20da3a2-goog
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