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authorArtem Bityutskiy <artem.bityutskiy@linux.intel.com>2013-03-14 13:27:40 +0200
committerDavid Woodhouse <David.Woodhouse@intel.com>2013-04-05 13:16:54 +0100
commit660685d9d1b4730f0b5ca97fa95f272f99c63bce (patch)
tree564d8e27ffc6059c1b39843cdea6a457afaaaba7 /drivers/mtd/mtdcore.h
parentcb70783c65c2eb1b4593fc0b285ddd6d38499185 (diff)
mtd: merge mtdchar module with mtdcore
The MTD subsystem has historically tried to be as configurable as possible. The side-effect of this is that its configuration menu is rather large, and we are gradually shrinking it. For example, we recently merged partitions support with the mtdcore. This patch does the next step - it merges the mtdchar module to mtdcore. And in this case this is not only about eliminating too fine-grained separation and simplifying the configuration menu. This is also about eliminating seemingly useless kernel module. Indeed, mtdchar is a module that allows user-space making use of MTD devices via /dev/mtd* character devices. If users do not enable it, they simply cannot use MTD devices at all. They cannot read or write the flash contents. Is it a sane and useful setup? I believe not. And everyone just enables mtdchar. Having mtdchar separate is also a little bit harmful. People sometimes miss the fact that they need to enable an additional configuration option to have user-space MTD interfaces, and then they wonder why on earth the kernel does not allow using the flash? They spend time asking around. Thus, let's just get rid of this module and make it part of mtd core. Note, mtdchar had additional configuration option to enable OTP interfaces, which are present on some flashes. I removed that option as well - it saves a really tiny amount space. [dwmw2: Strictly speaking, you can mount file systems on MTD devices just fine without the mtdchar (or mtdblock) devices; you just can't do other manipulations directly on the underlying device. But still I agree that it makes sense to make this unconditional. And Yay! we get to kill off an instance of checking CONFIG_foo_MODULE, which is an abomination that should never happen.] Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/mtdcore.h')
-rw-r--r--drivers/mtd/mtdcore.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/mtd/mtdcore.h b/drivers/mtd/mtdcore.h
index 9b10fed1ae2c..7b0353399a10 100644
--- a/drivers/mtd/mtdcore.h
+++ b/drivers/mtd/mtdcore.h
@@ -1,6 +1,6 @@
/*
- * These are exported solely for the purpose of mtd_blkdevs.c. You
- * should not use them for _anything_ else.
+ * These are exported solely for the purpose of mtd_blkdevs.c and mtdchar.c.
+ * You should not use them for _anything_ else.
*/
extern struct mutex mtd_table_mutex;
@@ -14,6 +14,9 @@ int parse_mtd_partitions(struct mtd_info *master, const char * const *types,
struct mtd_partition **pparts,
struct mtd_part_parser_data *data);
+int __init init_mtdchar(void);
+void __exit cleanup_mtdchar(void);
+
#define mtd_for_each_device(mtd) \
for ((mtd) = __mtd_next_device(0); \
(mtd) != NULL; \