diff options
| author | Pasha Tatashin <pasha.tatashin@soleen.com> | 2024-07-24 20:33:22 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-01 20:25:49 -0700 |
| commit | fbe76a6557a83af5ef3819fd7b7ffd0a5d3b4e51 (patch) | |
| tree | 39f9deb360b3a7445fdd4ab632001033086babb7 /kernel/exit.c | |
| parent | c4a6fce85640beb4f79e8217272d1ef79839cc17 (diff) | |
task_stack: uninline stack_not_used
Given that stack_not_used() is not performance critical function
uninline it.
Link: https://lkml.kernel.org/r/20240730150158.832783-4-pasha.tatashin@soleen.com
Link: https://lkml.kernel.org/r/20240724203322.2765486-4-pasha.tatashin@soleen.com
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Domenico Cerasuolo <cerasuolodomenico@gmail.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Li Zhijian <lizhijian@fujitsu.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel/exit.c')
| -rw-r--r-- | kernel/exit.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index 64bfc2bae55b..45085a0e7c16 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -778,6 +778,25 @@ static void exit_notify(struct task_struct *tsk, int group_dead) } #ifdef CONFIG_DEBUG_STACK_USAGE +unsigned long stack_not_used(struct task_struct *p) +{ + unsigned long *n = end_of_stack(p); + + do { /* Skip over canary */ +# ifdef CONFIG_STACK_GROWSUP + n--; +# else + n++; +# endif + } while (!*n); + +# ifdef CONFIG_STACK_GROWSUP + return (unsigned long)end_of_stack(p) - (unsigned long)n; +# else + return (unsigned long)n - (unsigned long)end_of_stack(p); +# endif +} + /* Count the maximum pages reached in kernel stacks */ static inline void kstack_histogram(unsigned long used_stack) { |