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author | Florian Fainelli <florian@openwrt.org> | 2013-01-08 22:19:31 +0000 |
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committer | Florian Fainelli <florian@openwrt.org> | 2013-01-08 22:19:31 +0000 |
commit | 8dbed04ec9cad7771590af557b9edfe8e04bca8c (patch) | |
tree | 412beb5055a726a8f371c35580bdc85300e4e2f7 /target/linux/generic/patches-3.8/903-debloat_direct_io.patch | |
parent | c38cb63808ff1a395dd0384af23773b044adf9cb (diff) | |
download | master-31e0f0ae-8dbed04ec9cad7771590af557b9edfe8e04bca8c.tar.gz master-31e0f0ae-8dbed04ec9cad7771590af557b9edfe8e04bca8c.tar.bz2 master-31e0f0ae-8dbed04ec9cad7771590af557b9edfe8e04bca8c.zip |
kernel: add support for 3.8-rc2
Signed-off-by: Florian Fainelli <florian@openwrt.org>
SVN-Revision: 35055
Diffstat (limited to 'target/linux/generic/patches-3.8/903-debloat_direct_io.patch')
-rw-r--r-- | target/linux/generic/patches-3.8/903-debloat_direct_io.patch | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.8/903-debloat_direct_io.patch b/target/linux/generic/patches-3.8/903-debloat_direct_io.patch new file mode 100644 index 0000000000..30d0238fde --- /dev/null +++ b/target/linux/generic/patches-3.8/903-debloat_direct_io.patch @@ -0,0 +1,84 @@ +--- a/fs/Kconfig ++++ b/fs/Kconfig +@@ -62,6 +62,11 @@ config FILE_LOCKING + for filesystems like NFS and for the flock() system + call. Disabling this option saves about 11k. + ++config DIRECT_IO ++ bool "Enable O_DIRECT support" if EXPERT ++ depends on BLOCK ++ default y ++ + source "fs/notify/Kconfig" + + source "fs/quota/Kconfig" +--- a/fs/Makefile ++++ b/fs/Makefile +@@ -14,7 +14,8 @@ obj-y := open.o read_write.o file_table. + stack.o fs_struct.o statfs.o + + ifeq ($(CONFIG_BLOCK),y) +-obj-y += buffer.o bio.o block_dev.o direct-io.o mpage.o ioprio.o ++obj-y += buffer.o bio.o block_dev.o mpage.o ioprio.o ++obj-$(CONFIG_DIRECT_IO) += direct-io.o + else + obj-y += no-block.o + endif +--- a/include/linux/fs.h ++++ b/include/linux/fs.h +@@ -2442,12 +2442,26 @@ enum { + DIO_SKIP_HOLES = 0x02, + }; + ++#ifdef CONFIG_DIRECT_IO + void dio_end_io(struct bio *bio, int error); + + ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, + struct block_device *bdev, const struct iovec *iov, loff_t offset, + unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io, + dio_submit_t submit_io, int flags); ++#else ++static inline void dio_end_io(struct bio *bio, int error) ++{ ++} ++static inline ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, ++ struct block_device *bdev, const struct iovec *iov, loff_t offset, ++ unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io, ++ dio_submit_t submit_io, int flags) ++{ ++ return -EOPNOTSUPP; ++} ++#endif ++ + + static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb, + struct inode *inode, const struct iovec *iov, loff_t offset, +--- a/fs/fcntl.c ++++ b/fs/fcntl.c +@@ -51,8 +51,10 @@ static int setfl(int fd, struct file * f + arg |= O_NONBLOCK; + + if (arg & O_DIRECT) { ++#ifdef CONFIG_DIRECT_IO + if (!filp->f_mapping || !filp->f_mapping->a_ops || + !filp->f_mapping->a_ops->direct_IO) ++#endif + return -EINVAL; + } + +--- a/fs/open.c ++++ b/fs/open.c +@@ -665,9 +665,12 @@ int open_check_o_direct(struct file *f) + { + /* NB: we're sure to have correct a_ops only after f_op->open */ + if (f->f_flags & O_DIRECT) { ++#ifdef CONFIG_DIRECT_IO + if (!f->f_mapping->a_ops || + ((!f->f_mapping->a_ops->direct_IO) && +- (!f->f_mapping->a_ops->get_xip_mem))) { ++ (!f->f_mapping->a_ops->get_xip_mem))) ++#endif ++ { + return -EINVAL; + } + } |