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| author |   Stefani Seibold <stefani@seibold.net> | 2013-11-14 14:32:17 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-15 09:32:23 +0900 |
| commit | 498d319bb512992ef0784c278fa03679f2f5649d (patch) | |
| tree | 2793b41c3a98b858d24aa833ccc2bfb2f6d60974 /mm/memory-failure.c | |
| parent | kfifo: kfifo_copy_{to,from}_user: fix copied bytes calculation (diff) | |
| download | linux-dev-498d319bb512992ef0784c278fa03679f2f5649d.tar.xz linux-dev-498d319bb512992ef0784c278fa03679f2f5649d.zip | |
kfifo API type safety
This patch enhances the type safety for the kfifo API. It is now safe
to put const data into a non const FIFO and the API will now generate a
compiler warning when reading from the fifo where the destination
address is pointing to a const variable.
As a side effect the kfifo_put() does now expect the value of an element
instead a pointer to the element. This was suggested Russell King. It
make the handling of the kfifo_put easier since there is no need to
create a helper variable for getting the address of a pointer or to pass
integers of different sizes.
IMHO the API break is okay, since there are currently only six users of
kfifo_put().
The code is also cleaner by kicking out the "if (0)" expressions.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Stefani Seibold <stefani@seibold.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory-failure.c')
| -rw-r--r-- | mm/memory-failure.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index f9d78ec7831f..b7c171602ba1 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1269,7 +1269,7 @@ void memory_failure_queue(unsigned long pfn, int trapno, int flags) mf_cpu = &get_cpu_var(memory_failure_cpu); spin_lock_irqsave(&mf_cpu->lock, proc_flags); - if (kfifo_put(&mf_cpu->fifo, &entry)) + if (kfifo_put(&mf_cpu->fifo, entry)) schedule_work_on(smp_processor_id(), &mf_cpu->work); else pr_err("Memory failure: buffer overflow when queuing memory failure at %#lx\n", |