Merge tag 'xfs-for-linus-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc...

[sagit-ice-cold/kernel_xiaomi_msm8998.git] / fs / dax.c

diff --git a/fs/dax.c b/fs/dax.c
index a86d3cc..131fd35 100644 (file)
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -29,6 +29,11 @@
 #include <linux/uio.h>
 #include <linux/vmstat.h>
 
+/*
+ * dax_clear_blocks() is called from within transaction context from XFS,
+ * and hence this means the stack from this point must follow GFP_NOFS
+ * semantics for all operations.
+ */
 int dax_clear_blocks(struct inode *inode, sector_t block, long size)
 {
        struct block_device *bdev = inode->i_sb->s_bdev;