| commit | 372a302e9a892229206aafca0352584a745bc5f3 | |
| author | Jiri Kosina <jkosina@suse.cz> | |
| Wed, 5 Dec 2007 07:45:05 +0000 (4 23:45 -0800) | ||
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | |
| Wed, 5 Dec 2007 17:21:18 +0000 (5 09:21 -0800) | ||
| tree | 14cf4e06735d8dd9284e843f36a5abcfcc4cc476 | treesnapshot (tar.gz zip) |
| parent | 5cd17569fd0eeca510735e63a6061291e3971bf6 | commitdiff |
RTC: assure proper memory ordering with respect to RTC_DEV_BUSY flag
We must make sure that the RTC_DEV_BUSY flag has proper lock semantics,
i.e. that the RTC_DEV_BUSY stores clearing the flag don't get reordered
before the preceeding stores and loads and vice versa.
Spotted by Nick Piggin.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: David Brownell <david-b@pacbell.net>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We must make sure that the RTC_DEV_BUSY flag has proper lock semantics,
i.e. that the RTC_DEV_BUSY stores clearing the flag don't get reordered
before the preceeding stores and loads and vice versa.
Spotted by Nick Piggin.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: David Brownell <david-b@pacbell.net>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| drivers/rtc/interface.c | diffblobblamehistory | |
| drivers/rtc/rtc-dev.c | diffblobblamehistory |