config CACHEFILES tristate "Filesystem caching on files" depends on FSCACHE && BLOCK help This permits use of a mounted filesystem as a cache for other filesystems - primarily networking filesystems - thus allowing fast local disk to enhance the speed of slower devices. See Documentation/filesystems/caching/cachefiles.txt for more information. config CACHEFILES_DEBUG bool "Debug CacheFiles" depends on CACHEFILES help This permits debugging to be dynamically enabled in the filesystem caching on files module. If this is set, the debugging output may be enabled by setting bits in /sys/modules/cachefiles/parameter/debug or by including a debugging specifier in /etc/cachefilesd.conf. config CACHEFILES_HISTOGRAM bool "Gather latency information on CacheFiles" depends on CACHEFILES && PROC_FS help This option causes latency information to be gathered on CacheFiles operation and exported through file: /proc/fs/cachefiles/histogram The generation of this histogram adds a certain amount of overhead to execution as there are a number of points at which data is gathered, and on a multi-CPU system these may be on cachelines that keep bouncing between CPUs. On the other hand, the histogram may be useful for debugging purposes. Saying 'N' here is recommended. See Documentation/filesystems/caching/cachefiles.txt for more information. orm> net-next plumbingsTobias Klauser
summaryrefslogtreecommitdiff
path: root/net/appletalk
diff options
context:
space:
mode:
authorJisheng Zhang <jszhang@marvell.com>2016-11-10 17:21:29 +0800
committerMark Brown <broonie@kernel.org>2016-11-11 15:38:08 +0000
commit09f2ba0b0b7c44ecea49cf69a708203b76ba5535 (patch)
tree042df33ac99f77d8b86ac427431e267c33561c35 /net/appletalk
parent1001354ca34179f3db924eb66672442a173147dc (diff)
regulator: gpio: properly check return value of of_get_named_gpio
The function of_get_named_gpio() could return -ENOENT, -EPROBE_DEFER -EINVAL and so on. Currently, for the optional property "enable-gpio", we only check -EPROBE_DEFER, this is not enough since there may be misconfigured "enable-gpio" in the DTB, of_get_named_gpio() will return -EINVAL in this case, we should return immediately here. And for the optional property "gpios", we didn't check the return value, the driver will continue to the point where gpio_request_array() is called, it doesn't make sense to continue if we got -EPROBE_DEFER or -EINVAL here. This patch tries to address these two issues by properly checking the return value of of_get_named_gpio. Signed-off-by: Jisheng Zhang <jszhang@marvell.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'net/appletalk')