linux.git/drivers/char/mem.c, branch v2.6.23

Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus

2007-07-10T21:48:43+00:00

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (62 commits)
  [MIPS] PNX8550: Cleanup proc code.
  [MIPS] WRPPMC: Fix build.
  [MIPS] Yosemite: Fix modpost warnings.
  [MIPS] Change names of local variables to silence sparse
  [MIPS] SB1: Fix modpost warning.
  [MIPS] PNX: Fix modpost warnings.
  [MIPS] Alchemy: Fix modpost warnings.
  [MIPS] Non-FPAFF: Fix warning.
  [MIPS] DEC: Fix modpost warning.
  [MIPS] MIPSsim: Enable MIPSsim virtual network driver.
  [MIPS] Delete Ocelot 3 support.
  [MIPS] remove LASAT Networks platforms support
  [MIPS] Early check for SMTC kernel on non-MT processor
  [MIPS] Add debugfs files to show fpuemu statistics
  [MIPS] Add some debugfs files to debug unaligned accesses
  [MIPS] rbtx4938: Fix secondary PCIC and glue internal NICs
  [MIPS] tc35815: Load MAC address via platform_device
  [MIPS] Move FPU affinity code into separate file.
  [MIPS] Make ioremap() work on TX39/49 special unmapped segment
  [MIPS] rbtx4938: Update and minimize defconfig
  ...

[MIPS] Hook for platforms to define cachability of /dev/mem regions

2007-07-10T16:32:56+00:00

Signed-off-by: Ralf Baechle

splice: divorce the splice structure/function definitions from the pipe header

2007-07-10T06:04:14+00:00

We need to move even more stuff into the header so that folks can use
the splice_to_pipe() implementation instead of open-coding a lot of
pipe knowledge (see relay implementation), so move to our own header
file finally.

Signed-off-by: Jens Axboe

Make /dev/port conditional on config symbol

2007-05-08T18:15:07+00:00

Instead of having /dev/port support dependent in multiple places on a
string of preprocessor symbols, define a new configuration directive for
it.  This ensures that all four places remain consistent with each other.

Signed-off-by: Russell King 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

header cleaning: don't include smp_lock.h when not used

2007-05-08T18:15:07+00:00

Remove includes of  where it is not used/needed.
Suggested by Al Viro.

Builds cleanly on x86_64, i386, alpha, ia64, powerpc, sparc,
sparc64, and arm (all 59 defconfigs).

Signed-off-by: Randy Dunlap 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fix bogon in /dev/mem mmap'ing on nommu

2007-04-17T23:36:27+00:00

While digging through my MAP_FIXED changes, I found that rather obvious
bug in /dev/mem mmap implementation for nommu archs. get_unmapped_area()
is expected to return an address, not a pfn.

Signed-off-by: Benjamin Herrenschmidt 
Acked-By: David Howells 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Revert "[PATCH] Fix up mmap_kmem"

2007-01-22T16:53:24+00:00

This reverts commit 99a10a60ba9bedcf5d70ef81414d3e03816afa3f.

As per Hugh Dickins:

  "Nadia Derbey has reported that mmap of /dev/kmem no longer works with
   the kernel virtual address as offset, and Franck has confirmed that
   his patch came from a misunderstanding of what an offset means to
   /dev/kmem - whereas his patch description seems to say that he was
   correcting the offset on a few plaforms, there was no such problem to
   correct, and his patch was in fact changing its API on all platforms."

Suggested-by: Hugh Dickins 
Cc: Franck Bui-Huu 
Cc: Nadia Derbey 
Cc: Andi Kleen 
Cc: Arjan van de Ven 
Cc: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] read_zero_pagealigned() locking fix

2006-12-10T17:55:39+00:00

Ramiro Voicu hits the BUG_ON(!pte_none(*pte)) in zeromap_pte_range: kernel
bugzilla 7645.  Right: read_zero_pagealigned uses down_read of mmap_sem,
but another thread's racing read of /dev/zero, or a normal fault, can
easily set that pte again, in between zap_page_range and zeromap_page_range
getting there.  It's been wrong ever since 2.4.3.

The simple fix is to use down_write instead, but that would serialize reads
of /dev/zero more than at present: perhaps some app would be badly
affected.  So instead let zeromap_page_range return the error instead of
BUG_ON, and read_zero_pagealigned break to the slower clear_user loop in
that case - there's no need to optimize for it.

Use -EEXIST for when a pte is found: BUG_ON in mmap_zero (the other user of
zeromap_page_range), though it really isn't interesting there.  And since
mmap_zero wants -EAGAIN for out-of-memory, the zeromaps better return that
than -ENOMEM.

Signed-off-by: Hugh Dickins 
Cc: Ramiro Voicu: 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] struct path: convert char-drivers

2006-12-08T16:28:44+00:00

Signed-off-by: Josef Sipek 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Driver core: change mem class_devices to be real devices

2006-12-01T22:52:00+00:00

Signed-off-by: Greg Kroah-Hartman