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| author | Jean Delvare <jdelvare@suse.de> | 2014-10-09 15:29:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-09 22:26:02 -0400 |
| commit | f0d6d1f6ff6f8525cfa396ec1969b8f402391445 (patch) | |
| tree | 281f528aa811d13960ae1d8cd117be432639abc6 /drivers/base/Kconfig | |
| parent | 86cf78d73de8c6bfa89804b91ee0ace71a459961 (diff) | |
| download | lwn-f0d6d1f6ff6f8525cfa396ec1969b8f402391445.tar.gz lwn-f0d6d1f6ff6f8525cfa396ec1969b8f402391445.zip | |
CMA: document cma=0
It isn't obvious that CMA can be disabled on the kernel's command line, so
document it.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Chuck Ebbert <cebbert.lkml@gmail.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/base/Kconfig')
| -rw-r--r-- | drivers/base/Kconfig | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig index 134f763d90fd..61a33f4ba608 100644 --- a/drivers/base/Kconfig +++ b/drivers/base/Kconfig @@ -252,6 +252,9 @@ config DMA_CMA to allocate big physically-contiguous blocks of memory for use with hardware components that do not support I/O map nor scatter-gather. + You can disable CMA by specifying "cma=0" on the kernel's command + line. + For more information see <include/linux/dma-contiguous.h>. If unsure, say "n". |