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| author | Ingo Molnar <mingo@kernel.org> | 2017-02-03 12:22:54 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-03-02 08:42:23 +0100 |
| commit | c930b2c0de32f45ce8f67affe936ce7a05b07b00 (patch) | |
| tree | 5a9d05bfeab3359d87ae9094572e64bfff97e743 /kernel/sched | |
| parent | 9ccd27cc2e8bfbec502d7c64a353dc4489536b81 (diff) | |
| download | linux-c930b2c0de32f45ce8f67affe936ce7a05b07b00.tar.bz2 | |
sched/core: Convert ___assert_task_state() link time assert to BUILD_BUG_ON()
The length of TASK_STATE_TO_CHAR_STR was still checked using the old
link-time manual error method - convert it to BUILD_BUG_ON(). This
has a couple of advantages:
- it's more obvious what's going on
- it reduces the size and complexity of <linux/sched.h>
- BUILD_BUG_ON() will fail during compilation, with a clearer
error message than the link time assert.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index bbfb917a9b49..7d76ccb79e91 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5233,6 +5233,9 @@ void sched_show_task(struct task_struct *p) int ppid; unsigned long state = p->state; + /* Make sure the string lines up properly with the number of task states: */ + BUILD_BUG_ON(sizeof(TASK_STATE_TO_CHAR_STR)-1 != ilog2(TASK_STATE_MAX)+1); + if (!try_get_task_stack(p)) return; if (state) |