Merge branch 'for-3.7/core' of git://git.kernel.dk/linux-block

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index c617ed024df87b952e968da04f988119b0db2d13..39f3e12ca752cd356ac714cb9272ef3ffa2f17ba 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -335,6 +335,7 @@ struct inodes_stat_t {
 #define BLKDISCARDZEROES _IO(0x12,124)
 #define BLKSECDISCARD _IO(0x12,125)
 #define BLKROTATIONAL _IO(0x12,126)
+#define BLKZEROOUT _IO(0x12,127)
 
 #define BMAP_IOCTL 1           /* obsolete - kept for compatibility */
 #define FIBMAP    _IO(0x00,1)  /* bmap access */
@@ -415,6 +416,7 @@ struct inodes_stat_t {
 #include <linux/migrate_mode.h>
 #include <linux/uidgid.h>
 #include <linux/lockdep.h>
+#include <linux/percpu-rwsem.h>
 
 #include <asm/byteorder.h>
 
@@ -724,6 +726,8 @@ struct block_device {
        int                     bd_fsfreeze_count;
        /* Mutex for freeze */
        struct mutex            bd_fsfreeze_mutex;
+       /* A semaphore that prevents I/O while block size is being changed */
+       struct percpu_rw_semaphore      bd_block_size_semaphore;
 };
 
 /*
@@ -2570,6 +2574,8 @@ extern int generic_segment_checks(const struct iovec *iov,
                unsigned long *nr_segs, size_t *count, int access_flags);
 
 /* fs/block_dev.c */
+extern ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,
+                              unsigned long nr_segs, loff_t pos);
 extern ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
                                unsigned long nr_segs, loff_t pos);
 extern int blkdev_fsync(struct file *filp, loff_t start, loff_t end,