Theodore Ts'o 02b9984d64 fs: push sync_filesystem() down to the file system's remount_fs() ... Previously, the no-op "mount -o mount /dev/xxx" operation when the file system is already mounted read-write causes an implied, unconditional syncfs(). This seems pretty stupid, and it's certainly documented or guaraunteed to do this, nor is it particularly useful, except in the case where the file system was mounted rw and is getting remounted read-only. However, it's possible that there might be some file systems that are actually depending on this behavior. In most file systems, it's probably fine to only call sync_filesystem() when transitioning from read-write to read-only, and there are some file systems where this is not needed at all (for example, for a pseudo-filesystem or something like romfs). Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: linux-fsdevel@vger.kernel.org Cc: Christoph Hellwig <hch@infradead.org> Cc: Artem Bityutskiy <dedekind1@gmail.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Evgeniy Dushistov <dushistov@mail.ru> Cc: Jan Kara <jack@suse.cz> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: Anders Larsen <al@alarsen.net> Cc: Phillip Lougher <phillip@squashfs.org.uk> Cc: Kees Cook <keescook@chromium.org> Cc: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz> Cc: Petr Vandrovec <petr@vandrovec.name> Cc: xfs@oss.sgi.com Cc: linux-btrfs@vger.kernel.org Cc: linux-cifs@vger.kernel.org Cc: samba-technical@lists.samba.org Cc: codalist@coda.cs.cmu.edu Cc: linux-ext4@vger.kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net Cc: fuse-devel@lists.sourceforge.net Cc: cluster-devel@redhat.com Cc: linux-mtd@lists.infradead.org Cc: jfs-discussion@lists.sourceforge.net Cc: linux-nfs@vger.kernel.org Cc: linux-nilfs@vger.kernel.org Cc: linux-ntfs-dev@lists.sourceforge.net Cc: ocfs2-devel@oss.oracle.com Cc: reiserfs-devel@vger.kernel.org		2014-03-13 10:14:33 -04:00
..
array.c	fs/proc/array.c: change do_task_stat() to use while_each_thread()	2014-01-23 16:37:02 -08:00
base.c	proc: fix ->f_pos overflows in first_tid()	2014-01-23 16:37:01 -08:00
cmdline.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
consoles.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
cpuinfo.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
devices.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
fd.c	proc: make proc_fd_permission() thread-friendly	2013-09-11 15:59:03 -07:00
fd.h	proc: Move proc_fd() to fs/proc/fd.h	2013-05-01 17:29:39 -04:00
generic.c	proc: set attributes of pde using accessor functions	2014-01-23 16:37:01 -08:00
inode.c	procfs: also fix proc_reg_get_unmapped_area() for !MMU case	2013-12-12 18:19:26 -08:00
internal.h	proc_fill_cache(): just make instantiate_t return int	2013-06-29 12:57:18 +04:00
interrupts.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
Kconfig	kcore: add Kconfig help text	2013-11-13 12:09:33 +09:00
kcore.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
kmsg.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
loadavg.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
Makefile	mm, vmalloc: move get_vmalloc_info() to vmalloc.c	2013-04-29 15:54:33 -07:00
meminfo.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
namespaces.c	consolidate simple ->d_delete() instances	2013-11-15 22:04:17 -05:00
nommu.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
page.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
proc_devtree.c	fs/proc/proc_devtree.c: remove empty /proc/device-tree when no openfirmware exists.	2014-01-23 16:37:01 -08:00
proc_net.c	[readdir] convert procfs	2013-06-29 12:56:32 +04:00
proc_sysctl.c	Don't pass inode to ->d_hash() and ->d_compare()	2013-06-29 12:57:36 +04:00
proc_tty.c	proc: use seq_puts()/seq_putc() where possible	2011-01-13 08:03:16 -08:00
root.c	fs: push sync_filesystem() down to the file system's remount_fs()	2014-03-13 10:14:33 -04:00
self.c	new helper: kfree_put_link()	2013-10-24 23:34:49 -04:00
softirqs.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
stat.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
task_mmu.c	seq_file: remove "%n" usage from seq_file users	2013-11-15 09:32:20 +09:00
task_nommu.c	seq_file: remove "%n" usage from seq_file users	2013-11-15 09:32:20 +09:00
uptime.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
version.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
vmcore.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00