linux-toradex.git/include/asm-mips, branch v2.6.20.21

[PATCH] mm: mremap correct rmap accounting

2007-01-30T16:33:32+00:00

Nick Piggin points out that page accounting on MIPS multiple ZERO_PAGEs
is not maintained by its move_pte, and could lead to freeing a ZERO_PAGE.

Instead of complicating that move_pte, just forget the minor optimization
when mremapping, and change the one thing which needed it for correctness
- filemap_xip use ZERO_PAGE(0) throughout instead of according to address.

[ "There is no block device driver one could use for XIP on mips
   platforms" - Carsten Otte ]

Signed-off-by: Hugh Dickins 
Cc: Nick Piggin 
Cc: Andrew Morton 
Cc: Ralf Baechle 
Cc: Carsten Otte 
Signed-off-by: Linus Torvalds

[MIPS] Fix wrong checksum calculation on 64-bit MIPS

2007-01-24T19:23:22+00:00

The commit 8e3d8433d8c22ca6c42cba4a67d300c39aae7822 ([NET]: MIPS
checksum annotations and cleanups) broke 64-bit MIPS.

The problem is the commit replaces some unsigned long with __be32.  On
64bit MIPS, a __be32 (i.e. unsigned int) value is represented as a
sign-extented 32-bit value in a 64-bit argument register.  So the
address 192.168.0.1 (0xc0a80001) is passed as 0xffffffffc0a80001 to
csum_tcpudp_nofold() but the asm code in the function expects
0x00000000c0a80001, therefore it returns a wrong checksum.  Explicit
cast to unsigned long is needed to drop high 32bit.

Signed-off-by: Atsushi Nemoto 
Signed-off-by: Ralf Baechle

[MIPS] vr41xx: need one more nop with mtc0_tlbw_hazard()

2007-01-24T19:23:21+00:00

NEC VR4111 and VR4121 need one more nop with mtc0_tlbw_hazard().

Signed-off-by: Yoichi Yuasa 
Signed-off-by: Ralf Baechle

[MIPS] Fix APM build

2007-01-24T19:23:21+00:00

Definitions for TIF_FREEZE and _TIF_FREEZE were missing.

Signed-off-by: Ralf Baechle

[MIPS] SMTC: Instant IPI replay.

2007-01-23T18:26:47+00:00

SMTC pseudo-interrupts between TCs are deferred and queued if the target
TC is interrupt-inhibited (IXMT). In the first SMTC prototypes, these
queued IPIs were serviced on return to user mode, or on entry into the
kernel idle loop. The INSTANT_REPLAY option dispatches them as part of
local_irq_restore() processing, which adds runtime overhead (hence the
option to turn it off), but ensures that IPIs are handled promptly even
under heavy I/O interrupt load.

Signed-off-by: Ralf Baechle

[MIPS] SMTC build fix

2007-01-08T21:41:04+00:00

Pass "irq" to __DO_IRQ_SMTC_HOOK() macro.

Signed-off-by: Atsushi Nemoto 
Signed-off-by: Ralf Baechle

[MIPS] csum_partial and copy in parallel

2007-01-08T21:41:04+00:00

Implement optimized asm version of csum_partial_copy_nocheck,
csum_partial_copy_from_user and csum_and_copy_to_user which can do
calculate and copy in parallel, based on memcpy.S.

Signed-off-by: Atsushi Nemoto 
Signed-off-by: Ralf Baechle

[PATCH] Optimize D-cache alias handling on fork

2006-12-13T17:27:08+00:00

Virtually index, physically tagged cache architectures can get away
without cache flushing when forking.  This patch adds a new cache
flushing function flush_cache_dup_mm(struct mm_struct *) which for the
moment I've implemented to do the same thing on all architectures
except on MIPS where it's a no-op.

Signed-off-by: Ralf Baechle 
Signed-off-by: Linus Torvalds

[PATCH] MIPS: Fix COW D-cache aliasing on fork

2006-12-13T17:27:08+00:00

Provide a custom copy_user_highpage() to deal with aliasing issues on
MIPS.  It uses kmap_coherent() to map an user page for kernel with same
color.  Rewrite copy_to_user_page() and copy_from_user_page() with the
new interfaces to avoid extra cache flushing.

The main part of this patch was originally written by Ralf Baechle;
Atushi Nemoto did the the debugging.

Signed-off-by: Atsushi Nemoto 
Signed-off-by: Ralf Baechle 
Signed-off-by: Linus Torvalds

[MIPS] IP27: Don't drag into topology.h.

2006-12-12T01:46:24+00:00

Another way that old SGI types were getting dragged into generic code.

Signed-off-by: Ralf Baechle