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authorChristoph Hellwig <hch@lst.de>2016-06-21 02:23:11 +0300
committerDave Chinner <david@fromorbit.com>2016-06-21 02:23:11 +0300
commitae259a9c8593f98aa60d045df978a5482a67c53f (patch)
treea3c07fa9fb8c61475ff85f4d8812d83c287258ff /fs/Makefile
parent199a31c6d93ba9dc6f831fa1e77d9926f34f4e8a (diff)
downloadlinux-ae259a9c8593f98aa60d045df978a5482a67c53f.tar.xz
fs: introduce iomap infrastructure
Add infrastructure for multipage buffered writes. This is implemented using an main iterator that applies an actor function to a range that can be written. This infrastucture is used to implement a buffered write helper, one to zero file ranges and one to implement the ->page_mkwrite VM operations. All of them borrow a fair amount of code from fs/buffers. for now by using an internal version of __block_write_begin that gets passed an iomap and builds the corresponding buffer head. The file system is gets a set of paired ->iomap_begin and ->iomap_end calls which allow it to map/reserve a range and get a notification once the write code is finished with it. Based on earlier code from Dave Chinner. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/Makefile')
-rw-r--r--fs/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/Makefile b/fs/Makefile
index 85b6e13b62d3..ed2b63257ba9 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -49,6 +49,7 @@ obj-$(CONFIG_COREDUMP) += coredump.o
obj-$(CONFIG_SYSCTL) += drop_caches.o
obj-$(CONFIG_FHANDLE) += fhandle.o
+obj-$(CONFIG_FS_IOMAP) += iomap.o
obj-y += quota/