linux-toradex.git/arch/parisc/kernel/parisc_ksyms.c, branch v3.11.2 Linux kernel for Apalis and Colibri modules parisc: Provide __ucmpdi2 to resolve undefined references in 32 bit builds. 2013-04-25T20:36:15+00:00 John David Anglin dave.anglin@bell.net 2013-04-20T19:41:06+00:00 ca0ad83da17b6ba07f9eb5902e69daac90c4fa61 The Debian experimental linux source package (3.8.5-1) build fails with the following errors: ... MODPOST 2016 modules ERROR: "__ucmpdi2" [fs/btrfs/btrfs.ko] undefined! ERROR: "__ucmpdi2" [drivers/md/dm-verity.ko] undefined! The attached patch resolves this problem. It is based on the s390 implementation of ucmpdi2.c. Signed-off-by: John David Anglin <dave.anglin@bell.net> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Signed-off-by: Helge Deller <deller@gmx.de> 
The Debian experimental linux source package (3.8.5-1) build fails
with the following errors:
...
MODPOST 2016 modules
ERROR: "__ucmpdi2" [fs/btrfs/btrfs.ko] undefined!
ERROR: "__ucmpdi2" [drivers/md/dm-verity.ko] undefined!

The attached patch resolves this problem.  It is based on the s390
implementation of ucmpdi2.c.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Signed-off-by: Helge Deller <deller@gmx.de>
parisc: fixes and cleanups in page cache flushing (1/4) 2013-02-20T21:49:19+00:00 John David Anglin dave.anglin@bell.net 2013-02-03T22:59:09+00:00 7633453978c54874849c5f40487ac9e14d43fc12 This is the first patch in a series of 4, with which the page cache flushing of parisc will gets fixed and enhanced. This even fixes the nasty "minifail" bug (http://wiki.parisc-linux.org/TestCases?highlight=%28minifail%29) which prevented parisc to stay an official debian port. Basically the flush in copy_user_page together with the TLB patch from commit 7139bc1579901b53db7e898789e916ee2fb52d78 is what fixes the minifail bug. This patch still uses the TMPALIAS approach. The new copy_user_page implementation calls flush_dcache_page_asm to flush the user dcache page (crucial for minifail fix) via a kernel TMPALIAS mapping. After that, it just copies the page using the kernel mapping. It does a final flush if needed. Generally it is hard to avoid doing some cache flushes using the kernel mapping (e.g., copy_to_user_page and copy_from_user_page). This patch depends on a subsequent change to pacache.S implementing clear_page_asm and copy_page_asm. These are optimized routines to clear and copy a page. The calls in clear_user_page and copy_user_page could be replaced by calls to memset and memcpy, respectively. I tested prefetch optimizations in clear_page_asm and copy_page_asm but didn't see any significant performance improvement on rp3440. I'm not sure if these are routines are significantly faster than memset and/or memcpy, but they are there for further performance evaluation. Signed-off-by: John David Anglin <dave.anglin@bell.net> Signed-off-by: Helge Deller <deller@gmx.de> 
This is the first patch in a series of 4, with which the page cache flushing of
parisc will gets fixed and enhanced. This even fixes the nasty "minifail" bug
(http://wiki.parisc-linux.org/TestCases?highlight=%28minifail%29) which
prevented parisc to stay an official debian port.  Basically the flush in
copy_user_page together with the TLB patch from commit
7139bc1579901b53db7e898789e916ee2fb52d78 is what fixes the minifail bug.

This patch still uses the TMPALIAS approach.  The new copy_user_page
implementation calls flush_dcache_page_asm to flush the user dcache page
(crucial for minifail fix) via a kernel TMPALIAS mapping.  After that, it just
copies the page using the kernel mapping.  It does a final flush if needed.
Generally it is hard to avoid doing some cache flushes using the kernel mapping
(e.g., copy_to_user_page and copy_from_user_page).

This patch depends on a subsequent change to pacache.S implementing
clear_page_asm and copy_page_asm.  These are optimized routines to clear and
copy a page.  The calls in clear_user_page and copy_user_page could be replaced
by calls to memset and memcpy, respectively.  I tested prefetch optimizations
in clear_page_asm and copy_page_asm but didn't see any significant performance
improvement on rp3440.  I'm not sure if these are routines are significantly
faster than memset and/or memcpy, but they are there for further performance
evaluation.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
[PARISC] update parisc to use generic strncpy_from_user() 2012-05-31T10:14:37+00:00 James Bottomley JBottomley@Parallels.com 2012-05-26T08:48:19+00:00 b1195c0e3ee1a1ba986923bf3ed8311b7b336432 Signed-off-by: James Bottomley <JBottomley@Parallels.com> 
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
atomic: use <linux/atomic.h> 2011-07-26T23:49:47+00:00 Arun Sharma asharma@fb.com 2011-07-26T23:09:06+00:00 60063497a95e716c9a689af3be2687d261f115b4 This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
This allows us to move duplicated code in <asm/atomic.h>
(atomic_inc_not_zero() for now) to <linux/atomic.h>

Signed-off-by: Arun Sharma <asharma@fb.com>
Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
parisc: add ftrace (function and graph tracer) functionality 2009-03-31T02:51:34+00:00 Helge Deller deller@gmx.de 2009-02-08T23:43:36+00:00 d75f054a2cf0614ff63d534ff21ca8eaab41e713 This patch adds the ftrace debugging functionality to the parisc kernel. It will currently only work with 64bit kernels, because the gcc options -pg and -ffunction-sections can't be enabled at the same time and -ffunction-sections is still needed to be able to link 32bit kernels. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Kyle McMartin <kyle@mcmartin.ca> 
This patch adds the ftrace debugging functionality to the parisc kernel.
It will currently only work with 64bit kernels, because the gcc options -pg
and -ffunction-sections can't be enabled at the same time and -ffunction-sections
is still needed to be able to link 32bit kernels.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
parisc: export copy_user_page_asm 2008-06-13T14:49:50+00:00 Kyle McMartin kyle@minerva.i.cabal.ca 2008-05-26T05:49:01+00:00 db51d92b90193cf69b2bcc2874fd0b267fd3e710 Needed by fuse (via copy_highpage). Signed-off-by: Kyle McMartin <kyle@mcmartin.ca> 
Needed by fuse (via copy_highpage).

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Generic semaphore implementation 2008-04-17T14:42:34+00:00 Matthew Wilcox matthew@wil.cx 2008-03-08T02:55:58+00:00 64ac24e738823161693bf791f87adc802cf529ff Semaphores are no longer performance-critical, so a generic C implementation is better for maintainability, debuggability and extensibility. Thanks to Peter Zijlstra for fixing the lockdep warning. Thanks to Harvey Harrison for pointing out that the unlikely() was unnecessary. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: Ingo Molnar <mingo@elte.hu> 
Semaphores are no longer performance-critical, so a generic C
implementation is better for maintainability, debuggability and
extensibility.  Thanks to Peter Zijlstra for fixing the lockdep
warning.  Thanks to Harvey Harrison for pointing out that the
unlikely() was unnecessary.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Revert "[PARISC] import necessary bits of libgcc.a" 2007-12-06T17:16:29+00:00 Kyle McMartin kyle@mako.i.cabal.ca 2007-11-28T07:07:35+00:00 9d29213fd469c4c409a30b8dbb88c4efcba6e0a6 This reverts commit efb80e7e097d0888e59fbbe4ded2ac5a256f556d, it turned out to cause sporadic problems with the timer interrupt on 32-bit kernels. Needs more investigation. Signed-off-by: Kyle McMartin <kyle@mcmartin.ca> 
This reverts commit efb80e7e097d0888e59fbbe4ded2ac5a256f556d, it turned
out to cause sporadic problems with the timer interrupt on 32-bit kernels.
Needs more investigation.

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
[PARISC] import necessary bits of libgcc.a 2007-10-18T07:58:49+00:00 Kyle McMartin kyle@mcmartin.ca 2007-10-18T07:06:26+00:00 efb80e7e097d0888e59fbbe4ded2ac5a256f556d Currently we're hacking libs-y to include libgcc.a, but this has unforeseen consequences since the userspace libgcc is linked with fpregs enabled. We need the kernel to stop using fpregs in an uncontrolled manner to implement lazy fpu state saves. Signed-off-by: Kyle McMartin <kyle@mcmartin.ca> 
Currently we're hacking libs-y to include libgcc.a, but this has
unforeseen consequences since the userspace libgcc is linked with fpregs
enabled. We need the kernel to stop using fpregs in an uncontrolled manner
to implement lazy fpu state saves.

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
[PARISC] use CONFIG_64BIT instead of __LP64__ 2007-02-17T06:16:40+00:00 Helge Deller deller@gmx.de 2007-01-28T13:58:52+00:00 a8f44e3889b686813926b288bd4e51a0cf17d2c7 - additionally update my copyright timestamps Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org> 
- additionally update my copyright timestamps

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>