linux-toradex.git/fs/char_dev.c, branch v2.6.17.8

[PATCH] Simplify proc/devices and fix early termination regression

2006-03-31T20:18:53+00:00

Make baby-simple the code for /proc/devices.  Based on the proven design
for /proc/interrupts.

This also fixes the early-termination regression 2.6.16 introduced, as
demonstrated by:

    # dd if=/proc/devices bs=1
    Character devices:
      1 mem
    27+0 records in
    27+0 records out

This should also work (but is untested) when /proc/devices >4096 bytes,
which I believe is what the original 2.6.16 rewrite fixed.

[akpm@osdl.org: cleanups, simplifications]
Signed-off-by: Joe Korty 
Cc: Neil Horman 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] Make most file operations structs in fs/ const

2006-03-28T17:16:06+00:00

This is a conversion to make the various file_operations structs in fs/
const.  Basically a regexp job, with a few manual fixups

The goal is both to increase correctness (harder to accidentally write to
shared datastructures) and reducing the false sharing of cachelines with
things that get dirty in .data (while .rodata is nicely read only and thus
cache clean)

Signed-off-by: Arjan van de Ven 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] mark f_ops const in the inode

2006-03-28T17:16:05+00:00

Mark the f_ops members of inodes as const, as well as fix the
ripple-through this causes by places that copy this f_ops and then "do
stuff" with it.

Signed-off-by: Arjan van de Ven 
Signed-off-by: Alexey Dobriyan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] use kzalloc and kcalloc in core fs code

2006-03-25T16:23:00+00:00

Signed-off-by: Oliver Neukum 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] kobj_map semaphore to mutex conversion

2006-03-20T21:42:58+00:00

Convert the kobj_map code to use a mutex instead of a semaphore.  It
converts the single two users as well, genhd.c and char_dev.c.

Signed-off-by: Jes Sorensen 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman

[PATCH] convert /proc/devices to use seq_file interface

2006-01-15T02:25:19+00:00

A Christoph suggested that the /proc/devices file be converted to use the
seq_file interface.  This patch does that.

I've obxerved one or two installation that had sufficiently large sans that
they overran the 4k limit on /proc/devices.

Signed-off-by: Neil Horman 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] cdev: cdev_put oops

2005-07-12T23:01:02+00:00

While fixing an oops in the st driver in a dirty release path, I
encountered an oops in cdev_put for cdevs allocated using cdev_alloc.  If
cdev_del is called when the cdev kobject still has an open user, when the
last cdev_put is called, the cdev_put will call kobject_put, which will end
up ultimately releasing the cdev in cdev_dynamic_release.  Patch fixes the
oops by preventing cdev_put from accessing freed memory.

Signed-off-by: Brian King 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] fix semaphore handling in __unregister_chrdev_region

2005-06-29T04:20:29+00:00

This up() should be down() instead.

Signed-off-by: Wen-chien Jesse Sung 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] add check to /proc/devices read routines

2005-06-23T16:45:19+00:00

Patch to add check to get_chrdev_list and get_blkdev_list to prevent reads
of /proc/devices from spilling over the provided page if more than 4096
bytes of string data are generated from all the registered character and
block devices in a system

Signed-off-by: Neil Horman 
Cc: Christoph Hellwig 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] make some things static

2005-05-05T23:36:47+00:00

This patch makes some needlessly global identifiers static.

Signed-off-by: Adrian Bunk 
Acked-by: Arjan van de Ven 
Acked-by: Trond Myklebust 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds