Revision 83db93f4de2d9ae441a491d1dc61c2204f0195de authored by Neil Brown on 15 September 2009, 23:05:51 UTC, committed by Greg Kroah-Hartman on 14 October 2009, 22:16:25 UTC
sysfs_notify_dirent is a simple atomic operation that can be used to alert user-space that new data can be read from a sysfs attribute. Unfortunately it cannot currently be called from non-process context because of its use of spin_lock which is sometimes taken with interrupts enabled. So change all lockers of sysfs_open_dirent_lock to disable interrupts, thus making sysfs_notify_dirent safe to be called from non-process context (as drivers/md does in md_safemode_timeout). sysfs_get_open_dirent is (documented as being) only called from process context, so it uses spin_lock_irq. Other places use spin_lock_irqsave. The usage for sysfs_notify_dirent in md_safemode_timeout was introduced in 2.6.28, so this patch is suitable for that and more recent kernels. Reported-by: Joel Andres Granados <jgranado@redhat.com> Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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File | Mode | Size |
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aoa | ||
arm | ||
atmel | ||
core | ||
drivers | ||
i2c | ||
isa | ||
mips | ||
oss | ||
parisc | ||
pci | ||
pcmcia | ||
ppc | ||
sh | ||
soc | ||
sparc | ||
spi | ||
synth | ||
usb | ||
Kconfig | -rw-r--r-- | 3.8 KB |
Makefile | -rw-r--r-- | 529 bytes |
ac97_bus.c | -rw-r--r-- | 1.6 KB |
last.c | -rw-r--r-- | 1.3 KB |
sound_core.c | -rw-r--r-- | 16.0 KB |
sound_firmware.c | -rw-r--r-- | 1.7 KB |
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