diff options
| author |   Matthew Wilcox <willy@infradead.org> | 2016-12-14 15:08:02 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-14 16:04:09 -0800 |
| commit | 847d357635ce4c63b8901ab81333586a0f115fa5 (patch) | |
| tree | 512d5cb1f6aa8f44a07dbfe8e501297e5b8aebb7 /tools/testing/radix-tree/linux/preempt.h | |
| parent | radix tree test suite: allow GFP_ATOMIC allocations to fail (diff) | |
| download | linux-dev-847d357635ce4c63b8901ab81333586a0f115fa5.tar.xz linux-dev-847d357635ce4c63b8901ab81333586a0f115fa5.zip | |
radix tree test suite: track preempt_count
Rather than simply NOP out preempt_enable() and preempt_disable(), keep
track of preempt_count and display it regularly in case either the test
suite or the code under test is forgetting to balance the enables &
disables. Only found a test-case that was forgetting to re-enable
preemption, but it's a possibility worth checking.
Link: http://lkml.kernel.org/r/1480369871-5271-39-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/testing/radix-tree/linux/preempt.h')
| -rw-r--r-- | tools/testing/radix-tree/linux/preempt.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/testing/radix-tree/linux/preempt.h b/tools/testing/radix-tree/linux/preempt.h index 6210672e3baa..65c04c226965 100644 --- a/tools/testing/radix-tree/linux/preempt.h +++ b/tools/testing/radix-tree/linux/preempt.h @@ -1,4 +1,4 @@ -/* */ +extern int preempt_count; -#define preempt_disable() do { } while (0) -#define preempt_enable() do { } while (0) +#define preempt_disable() uatomic_inc(&preempt_count) +#define preempt_enable() uatomic_dec(&preempt_count) |