From 8c0b388ab19c6a0c1a726ec00c445038d4da7fdc Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 12 Aug 2002 18:06:55 -0700 Subject: [PATCH] i_sem-less generic_file_write for O_DIRECT & XFS There are a number of places where generic_file_write could be used if it didn't take i_sem by itself or where it doesn't need it: (1) XFS needs to do some preparation in it's write file operation (most notably taking it's own per-inode locks), after taking i_sem, but before calling the guts of generic_file_write. (2) blockdevices are happy with parralel get_block() operations, and there is nothing i_sem could protect. This patch introduces a generic_file_write_nolock and makes the good old generic_file_write a wrapper around. The block device code is switched over to it. --- include/linux/fs.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/fs.h b/include/linux/fs.h index 192107379fd9..ec0f6edac31b 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1241,6 +1241,7 @@ extern int generic_file_mmap(struct file *, struct vm_area_struct *); extern int file_read_actor(read_descriptor_t * desc, struct page *page, unsigned long offset, unsigned long size); extern ssize_t generic_file_read(struct file *, char *, size_t, loff_t *); extern ssize_t generic_file_write(struct file *, const char *, size_t, loff_t *); +extern ssize_t generic_file_write_nolock(struct file *, const char *, size_t, loff_t *); extern ssize_t generic_file_sendfile(struct file *, struct file *, loff_t *, size_t); extern void do_generic_file_read(struct file *, loff_t *, read_descriptor_t *, read_actor_t); ssize_t generic_file_direct_IO(int rw, struct inode *inode, char *buf, -- cgit v1.2.3