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authorPaul Gortmaker <paul.gortmaker@windriver.com>2013-09-30 13:45:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-30 14:31:02 -0700
commit080506ad0aa9c9fbc7879cdd290d55624da08c60 (patch)
tree8a696742dcaaee55f1a9524b87be7dfa960eb3d6
parenteadb41ae82f802105c0601aa8a0a0e7595826497 (diff)
downloadlinux-linaro-stable-080506ad0aa9c9fbc7879cdd290d55624da08c60.tar.gz
block: change config option name for cmdline partition parsing
Recently commit bab55417b10c ("block: support embedded device command line partition") introduced CONFIG_CMDLINE_PARSER. However, that name is too generic and sounds like it enables/disables generic kernel boot arg processing, when it really is block specific. Before this option becomes a part of a full/final release, add the BLK_ prefix to it so that it is clear in absence of any other context that it is block specific. In addition, fix up the following less critical items: - help text was not really at all helpful. - index file for Documentation was not updated - add the new arg to Documentation/kernel-parameters.txt - clarify wording in source comments Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Cai Zhiyong <caizhiyong@huawei.com> Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--Documentation/block/00-INDEX2
-rw-r--r--Documentation/block/cmdline-partition.txt8
-rw-r--r--Documentation/kernel-parameters.txt4
-rw-r--r--block/Kconfig9
-rw-r--r--block/Makefile2
-rw-r--r--block/partitions/Kconfig4
-rw-r--r--block/partitions/cmdline.c8
7 files changed, 24 insertions, 13 deletions
diff --git a/Documentation/block/00-INDEX b/Documentation/block/00-INDEX
index d18ecd827c40..929d9904f74b 100644
--- a/Documentation/block/00-INDEX
+++ b/Documentation/block/00-INDEX
@@ -6,6 +6,8 @@ capability.txt
- Generic Block Device Capability (/sys/block/<device>/capability)
cfq-iosched.txt
- CFQ IO scheduler tunables
+cmdline-partition.txt
+ - how to specify block device partitions on kernel command line
data-integrity.txt
- Block data integrity
deadline-iosched.txt
diff --git a/Documentation/block/cmdline-partition.txt b/Documentation/block/cmdline-partition.txt
index 2bbf4cc40c3f..525b9f6d7fb4 100644
--- a/Documentation/block/cmdline-partition.txt
+++ b/Documentation/block/cmdline-partition.txt
@@ -1,9 +1,9 @@
-Embedded device command line partition
+Embedded device command line partition parsing
=====================================================================
-Read block device partition table from command line.
-The partition used for fixed block device (eMMC) embedded device.
-It is no MBR, save storage space. Bootloader can be easily accessed
+Support for reading the block device partition table from the command line.
+It is typically used for fixed block (eMMC) embedded devices.
+It has no MBR, so saves storage space. Bootloader can be easily accessed
by absolute address of data on the block device.
Users can easily change the partition.
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 73d23fdc512b..fcbb736d55fe 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -480,6 +480,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
Format: <io>,<irq>,<mode>
See header of drivers/net/hamradio/baycom_ser_hdx.c.
+ blkdevparts= Manual partition parsing of block device(s) for
+ embedded devices based on command line input.
+ See Documentation/block/cmdline-partition.txt
+
boot_delay= Milliseconds to delay each printk during boot.
Values larger than 10 seconds (10000) are changed to
no delay (0).
diff --git a/block/Kconfig b/block/Kconfig
index 7f38e40fee08..2429515c05c2 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -99,11 +99,16 @@ config BLK_DEV_THROTTLING
See Documentation/cgroups/blkio-controller.txt for more information.
-config CMDLINE_PARSER
+config BLK_CMDLINE_PARSER
bool "Block device command line partition parser"
default n
---help---
- Parsing command line, get the partitions information.
+ Enabling this option allows you to specify the partition layout from
+ the kernel boot args. This is typically of use for embedded devices
+ which don't otherwise have any standardized method for listing the
+ partitions on a block device.
+
+ See Documentation/block/cmdline-partition.txt for more information.
menu "Partition Types"
diff --git a/block/Makefile b/block/Makefile
index 4fa4be544ece..671a83d063a5 100644
--- a/block/Makefile
+++ b/block/Makefile
@@ -18,4 +18,4 @@ obj-$(CONFIG_IOSCHED_CFQ) += cfq-iosched.o
obj-$(CONFIG_BLOCK_COMPAT) += compat_ioctl.o
obj-$(CONFIG_BLK_DEV_INTEGRITY) += blk-integrity.o
-obj-$(CONFIG_CMDLINE_PARSER) += cmdline-parser.o
+obj-$(CONFIG_BLK_CMDLINE_PARSER) += cmdline-parser.o
diff --git a/block/partitions/Kconfig b/block/partitions/Kconfig
index 87a32086535d..9b29a996c311 100644
--- a/block/partitions/Kconfig
+++ b/block/partitions/Kconfig
@@ -263,7 +263,7 @@ config SYSV68_PARTITION
config CMDLINE_PARTITION
bool "Command line partition support" if PARTITION_ADVANCED
- select CMDLINE_PARSER
+ select BLK_CMDLINE_PARSER
help
- Say Y here if you would read the partitions table from bootargs.
+ Say Y here if you want to read the partition table from bootargs.
The format for the command line is just like mtdparts.
diff --git a/block/partitions/cmdline.c b/block/partitions/cmdline.c
index 56cf4ffad51e..5141b563adf1 100644
--- a/block/partitions/cmdline.c
+++ b/block/partitions/cmdline.c
@@ -2,15 +2,15 @@
* Copyright (C) 2013 HUAWEI
* Author: Cai Zhiyong <caizhiyong@huawei.com>
*
- * Read block device partition table from command line.
- * The partition used for fixed block device (eMMC) embedded device.
- * It is no MBR, save storage space. Bootloader can be easily accessed
+ * Read block device partition table from the command line.
+ * Typically used for fixed block (eMMC) embedded devices.
+ * It has no MBR, so saves storage space. Bootloader can be easily accessed
* by absolute address of data on the block device.
* Users can easily change the partition.
*
* The format for the command line is just like mtdparts.
*
- * Verbose config please reference "Documentation/block/cmdline-partition.txt"
+ * For further information, see "Documentation/block/cmdline-partition.txt"
*
*/