kernel.git/arch/mips/kernel/kspd.c, branch linux-2.6.34.y

vfs: Implement proper O_SYNC semantics

2009-12-10T14:02:50Z

While Linux provided an O_SYNC flag basically since day 1, it took until Linux 2.4.0-test12pre2 to actually get it implemented for filesystems, since that day we had generic_osync_around with only minor changes and the great "For now, when the user asks for O_SYNC, we'll actually give O_DSYNC" comment. This patch intends to actually give us real O_SYNC semantics in addition to the O_DSYNC semantics. After Jan's O_SYNC patches which are required before this patch it's actually surprisingly simple, we just need to figure out when to set the datasync flag to vfs_fsync_range and when not. This patch renames the existing O_SYNC flag to O_DSYNC while keeping it's numerical value to keep binary compatibility, and adds a new real O_SYNC flag. To guarantee backwards compatiblity it is defined as expanding to both the O_DSYNC and the new additional binary flag (__O_SYNC) to make sure we are backwards-compatible when compiled against the new headers. This also means that all places that don't care about the differences can just check O_DSYNC and get the right behaviour for O_SYNC, too - only places that actuall care need to check __O_SYNC in addition. Drivers and network filesystems have been updated in a fail safe way to always do the full sync magic if O_DSYNC is set. The few places setting O_SYNC for lower layers are kept that way for now to stay failsafe. We enforce that O_DSYNC is set when __O_SYNC is set early in the open path to make sure we always get these sane options. Note that parisc really screwed up their headers as they already define a O_DSYNC that has always been a no-op. We try to repair it by using it for the new O_DSYNC and redefinining O_SYNC to send both the traditional O_SYNC numerical value _and_ the O_DSYNC one. Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Grant Grundler Cc: "David S. Miller" Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Thomas Gleixner Cc: Al Viro Cc: Andreas Dilger Acked-by: Trond Myklebust Acked-by: Kyle McMartin Acked-by: Ulrich Drepper Signed-off-by: Christoph Hellwig Signed-off-by: Andrew Morton Signed-off-by: Jan Kara

MIPS: VPE: Fix build after the credential changes a while ago.

2009-09-30T19:47:02Z

Signed-off-by: Ralf Baechle

MIPS: Remove useless zero initializations.

2009-09-17T18:07:51Z

Signed-off-by: Ralf Baechle

CRED: Separate task security context from task_struct

2008-11-13T23:39:16Z

Separate the task security context from task_struct. At this point, the security data is temporarily embedded in the task_struct with two pointers pointing to it. Note that the Alpha arch is altered as it refers to (E)UID and (E)GID in entry.S via asm-offsets. With comment fixes Signed-off-by: Marc Dionne Signed-off-by: David Howells Acked-by: James Morris Acked-by: Serge Hallyn Signed-off-by: James Morris

[MIPS] MT: Functional fixes and a little reformatting of APRP support

2008-05-12T15:46:51Z

Signed-off-by: Kevin D. Kissell Signed-off-by: Ralf Baechle

[PATCH] split linux/file.h

2008-05-01T17:08:16Z

Initial splitoff of the low-level stuff; taken to fdtable.h Signed-off-by: Al Viro

arch/mips/: Spelling fixes

2008-02-03T14:54:53Z

Signed-off-by: Joe Perches Signed-off-by: Adrian Bunk

[MIPS] Converting most array size calculations to use ARRAY_SIZE().

2008-01-29T10:14:54Z

Signed-off-by: Alejandro Martinez Ruiz Signed-off-by: Ralf Baechle

[MIPS] checkfiles: Fix "need space after that ','" errors.

2007-10-11T22:46:15Z

Signed-off-by: Ralf Baechle

[MIPS] Fix "no space between function name and open parenthesis" warnings.

2007-10-11T22:46:15Z

Signed-off-by: Ralf Baechle