linux-toradex.git/arch/alpha/include/asm, branch tegra-10.9.4

block: add helpers to run flush_dcache_page() against a bio and a request's pages

2010-04-05T21:03:24+00:00

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 
Cc: Ingo Molnar 
Cc: David Woodhouse 
Cc: Peter Horton 
Cc: "Ed L. Cashin" 
Signed-off-by: Jens Axboe

Alpha: Rearrange thread info flags fixing two regressions

2009-12-01T03:44:40+00:00

The removal of the TIF_NOTIFY_RESUME flag, commit a583f1b54249b
"remove unused TIF_NOTIFY_RESUME flag," resulted in incorrect
setting of the unaligned access control flags by the prctl syscall.

The re-addition of the TIF_NOTIFY_RESUME flag, commit d0420c83f39f
"KEYS: Extend TIF_NOTIFY_RESUME to (almost) all architectures [try #6]"
further caused problems, namely incorrect operands to assembler code
as evidenced by:

AS      arch/alpha/kernel/entry.o
arch/alpha/kernel/entry.S: Assembler messages:
arch/alpha/kernel/entry.S:326: Warning: operand out of range
(0x0000000000000406 is not between 0x0000000000000000 and
0x00000000000000ff)

Both regressions fixed by (1) rearranging TIF_NOTIFY_RESUME flag to be
in lower 8 bits of the thread info flags, and (2) making sure that
ALPHA_UAC_SHIFT matches the rearrangement of the thread info flags.

Signed-off-by: Michael Cree 
Cc: Richard Henderson 
Cc: Ivan Kokshaysky 
Cc: David Howells ,
Signed-off-by: Matt Turner

fcntl: Use consistent values for F_[GS]ETOWN_EX

2009-11-17T17:13:43+00:00

These values were only introduced during this release cycle, so it is
still early enough to get them right.

alpha uses the same values that are in asm-generic/fcntl.h, so just
remove them.

parisc uses the values interchanged for no apparent reason, so remove
them to give us consistency across all architectures.

Signed-off-by: Stephen Rothwell 
Signed-off-by: Linus Torvalds

alpha: move THREAD_SIZE definition outside #ifndef ASSEMBLY

2009-11-12T15:25:56+00:00

arch/alpha/kernel/vmlinux.lds.S uses it:

arch/alpha/kernel/vmlinux.lds:241: undefined symbol `THREAD_SIZE' referenced in expression

Seems to have been caused by

commit 9d93f00580243cc059510d9d6ac4d2f5e97e5b83
Author:     Geoffrey Thomas 
AuthorDate: Thu Sep 24 10:36:26 2009 -0400
Commit:     Linus Torvalds 
CommitDate: Thu Sep 24 17:16:22 2009 -0700

    alpha: Clean up linker script using new linker script macros.

    Note that .data.page_aligned and .data.cacheline_aligned are now after
    _data; it was probably a bug that they were before it.

    Also, some explicit ALIGN(8)'s between various initcall sections were
    removed; this should be harmless as the implicit alignment of
    initcall_t was already 8.

Cc: Geoffrey Thomas 
Cc: Tim Abbott 
Cc: Ivan Kokshaysky 
Cc: Sam Ravnborg 
Cc: Richard Henderson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

alpha: fix F_SETOWN_EX and F_GETLK64 conflict

2009-11-12T15:25:56+00:00

Fix a bug in

    commit ba0a6c9f6fceed11c6a99e8326f0477fe383e6b5
    Author:     Peter Zijlstra 
    AuthorDate: Wed Sep 23 15:57:03 2009 -0700
    Commit:     Linus Torvalds 
    CommitDate: Thu Sep 24 07:21:01 2009 -0700

        fcntl: add F_[SG]ETOWN_EX

In asm-generic/fcntl.h, F_SETOWN_EX and F_GETLK64 both have value 12, and
F_GETOWN_EX and F_SETLK64 both have value 13.

Reported-by: "Joseph S. Myers" 
Cc: Richard Henderson 
Cc: Ivan Kokshaysky 
Cc: Andreas Schwab 
Signed-off-by: Peter Zijlstra 
Acked-by: Ulrich Drepper 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fcntl: add F_[SG]ETOWN_EX

2009-09-24T14:21:01+00:00

In order to direct the SIGIO signal to a particular thread of a
multi-threaded application we cannot, like suggested by the manpage, put a
TID into the regular fcntl(F_SETOWN) call.  It will still be send to the
whole process of which that thread is part.

Since people do want to properly direct SIGIO we introduce F_SETOWN_EX.

The need to direct SIGIO comes from self-monitoring profiling such as with
perf-counters.  Perf-counters uses SIGIO to notify that new sample data is
available.  If the signal is delivered to the same task that generated the
new sample it can augment that data by inspecting the task's user-space
state right after it returns from the kernel.  This is esp.  convenient
for interpreted or virtual machine driven environments.

Both F_SETOWN_EX and F_GETOWN_EX take a pointer to a struct f_owner_ex
as argument:

struct f_owner_ex {
	int   type;
	pid_t pid;
};

Where type is one of F_OWNER_TID, F_OWNER_PID or F_OWNER_GID.

Signed-off-by: Peter Zijlstra 
Reviewed-by: Oleg Nesterov 
Tested-by: stephane eranian 
Cc: Michael Kerrisk 
Cc: Roland McGrath 
Cc: Al Viro 
Cc: Christoph Hellwig 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cpumask: remove arch_send_call_function_ipi

2009-09-24T00:04:47+00:00

Now everyone is converted to arch_send_call_function_ipi_mask, remove
the shim and the #defines.

Signed-off-by: Rusty Russell

cpumask: arch_send_call_function_ipi_mask: alpha

2009-09-24T00:04:43+00:00

We're weaning the core code off handing cpumask's around on-stack.
This introduces arch_send_call_function_ipi_mask().

We also take the chance to wean the send_ipi_message off the
obsolescent for_each_cpu_mask(): making it take a pointer seemed the
most natural way to do this.

Signed-off-by: Rusty Russell

cpumask: remove obsolete node_to_cpumask now everyone uses cpumask_of_node

2009-09-24T00:04:34+00:00

Signed-off-by: Rusty Russell

cpumask: remove the now-obsoleted pcibus_to_cpumask(): alpha

2009-09-24T00:04:25+00:00

cpumask_of_pcibus() is the new version.

Signed-off-by: Rusty Russell