linux-toradex.git/arch/parisc/include/asm/cacheflush.h, branch v2.6.35.3 Linux kernel for Apalis and Colibri modules parisc: Call pagefault_disable/pagefault_enable in kmap_atomic/kunmap_atomic 2010-05-30T09:48:32+00:00 John David Anglin dave@hiauly1.hia.nrc.ca 2010-04-11T16:36:14+00:00 210501aa570fdaa8b06e56fd1c04f31f2d3f368b Based on the generic implementation of kmap_atomic and kunmap_atomic, we should call pagefault_disable and pagefault_enable in our PA8000 implementation. The define for kmap_atomic_prot was also missing, and I updated kmap_atomic_pfn to use the generic implementation because of the change to kmap_atomic. I believe that this change is needed to fix the fork copy-on-write bug. Signed-off-by: John David Anglin <dave.anglin@nrc-cnrc.gc.ca> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org> 
Based on the generic implementation of kmap_atomic and kunmap_atomic,
we should call pagefault_disable and pagefault_enable in our PA8000
implementation.

The define for kmap_atomic_prot was also missing, and I updated
kmap_atomic_pfn to use the generic implementation because of the
change to kmap_atomic.

I believe that this change is needed to fix the fork copy-on-write
bug.

Signed-off-by: John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
parisc: add mm API for DMA to vmalloc/vmap areas 2010-02-05T18:31:37+00:00 James Bottomley James.Bottomley@suse.de 2010-01-25T17:42:21+00:00 ef7cc35b0ee03431731186320b18e5da585341ff We already have an API to flush a kernel page along an alias address, so use it. The TLB purge prevents the CPU from doing speculative moveins on the flushed address, so we don't need to implement and invalidate. Acked-by: Kyle McMartin <kyle@mcmartin.ca> Signed-off-by: James Bottomley <James.Bottomley@suse.de> 
We already have an API to flush a kernel page along an alias
address, so use it.  The TLB purge prevents the CPU from doing
speculative moveins on the flushed address, so we don't need to
implement and invalidate.

Acked-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
block: add helpers to run flush_dcache_page() against a bio and a request's pages 2009-11-26T08:16:19+00:00 Ilya Loginov isloginov@gmail.com 2009-11-26T08:16:19+00:00 2d4dc890b5c8fabd818a8586607e6843c4375e62 Mtdblock driver doesn't call flush_dcache_page for pages in request. So, this causes problems on architectures where the icache doesn't fill from the dcache or with dcache aliases. The patch fixes this. The ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE symbol was introduced to avoid pointless empty cache-thrashing loops on architectures for which flush_dcache_page() is a no-op. Every architecture was provided with this flush pages on architectires where ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE is equal 1 or do nothing otherwise. See "fix mtd_blkdevs problem with caches on some architectures" discussion on LKML for more information. Signed-off-by: Ilya Loginov <isloginov@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Peter Horton <phorton@bitbox.co.uk> Cc: "Ed L. Cashin" <ecashin@coraid.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com> 
Mtdblock driver doesn't call flush_dcache_page for pages in request.  So,
this causes problems on architectures where the icache doesn't fill from
the dcache or with dcache aliases.  The patch fixes this.

The ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE symbol was introduced to avoid
pointless empty cache-thrashing loops on architectures for which
flush_dcache_page() is a no-op.  Every architecture was provided with this
flush pages on architectires where ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE is
equal 1 or do nothing otherwise.

See "fix mtd_blkdevs problem with caches on some architectures" discussion
on LKML for more information.

Signed-off-by: Ilya Loginov <isloginov@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Peter Horton <phorton@bitbox.co.uk>
Cc: "Ed L. Cashin" <ecashin@coraid.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
parisc: fix build when ARCH_HAS_KMAP 2009-04-02T02:42:53+00:00 Kyle McMartin kyle@mcmartin.ca 2009-04-02T02:40:41+00:00 bb7350194130ae6bd3fdec16fe1b7597c1c0bb8d When we build for PA8X00, we define ARCH_HAS_KMAP, which results in the kmap_types.h include in highmem.h getting skipped... In file included from include/linux/pagemap.h:10, from include/linux/mempolicy.h:62, from init/main.c:52: include/linux/highmem.h:196: warning: 'enum km_type' declared inside parameter list include/linux/highmem.h:196: warning: its scope is only this definition or declaration, which is probably not what you want include/linux/highmem.h:196: error: parameter 1 ('type') has incomplete type Signed-off-by: Kyle McMartin <kyle@mcmartin.ca> 
When we build for PA8X00, we define ARCH_HAS_KMAP, which results in
the kmap_types.h include in highmem.h getting skipped...

In file included from include/linux/pagemap.h:10,
                 from include/linux/mempolicy.h:62,
                 from init/main.c:52:
include/linux/highmem.h:196: warning: 'enum km_type' declared inside parameter list
include/linux/highmem.h:196: warning: its scope is only this definition or declaration, which is probably not what you want
include/linux/highmem.h:196: error: parameter 1 ('type') has incomplete type

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
parisc: move include/asm-parisc to arch/parisc/include/asm 2008-10-10T16:32:29+00:00 Kyle McMartin kyle@mcmartin.ca 2008-07-29T03:02:13+00:00 deae26bf6a10e47983606f5df080b91e97650ead