linux.git/arch/alpha/include/asm, branch v2.6.37

alpha: use single HAE window on T2 core logic (gamma, sable)

2010-10-26T23:52:12+00:00

T2 are the only alpha SMP systems that do HAE switching at runtime, which
is fundamentally racy on SMP.  This patch limits MMIO space on T2 to HAE0
only, like we did on MCPCIA (rawhide) long ago.  This leaves us with only
112 Mb of PCI MMIO (128 Mb HAE aperture minus 16 Mb reserved for EISA),
but since linux PCI allocations are reasonably tight, it should be enough
for sane hardware configurations.

Also, fix a typo in MCPCIA_FROB_MMIO macro which shouldn't call set_hae()
if MCPCIA_ONE_HAE_WINDOW is defined.  It's more for correctness, as
set_hae() is a no-op anyway in that case.

Signed-off-by: Ivan Kokshaysky 
Cc: Matt Turner 
Cc: Richard Henderson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: remove pte_*map_nested()

2010-10-26T23:52:08+00:00

Since we no longer need to provide KM_type, the whole pte_*map_nested()
API is now redundant, remove it.

Signed-off-by: Peter Zijlstra 
Acked-by: Chris Metcalf 
Cc: David Howells 
Cc: Hugh Dickins 
Cc: Rik van Riel 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: "H. Peter Anvin" 
Cc: Steven Rostedt 
Cc: Russell King 
Cc: Ralf Baechle 
Cc: David Miller 
Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-irqflags

2010-10-21T21:37:27+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-irqflags:
  Fix IRQ flag handling naming
  MIPS: Add missing #inclusions of 
  smc91x: Add missing #inclusion of 
  Drop a couple of unnecessary asm/system.h inclusions
  SH: Add missing consts to sys_execve() declaration
  Blackfin: Rename IRQ flags handling functions
  Blackfin: Add missing dep to asm/irqflags.h
  Blackfin: Rename DES PC2() symbol to avoid collision
  Blackfin: Split the BF532 BFIN_*_FIO_FLAG() functions to their own header
  Blackfin: Split PLL code from mach-specific cdef headers

irq_work: Add generic hardirq context callbacks

2010-10-18T17:58:50+00:00

Provide a mechanism that allows running code in IRQ context. It is
most useful for NMI code that needs to interact with the rest of the
system -- like wakeup a task to drain buffers.

Perf currently has such a mechanism, so extract that and provide it as
a generic feature, independent of perf so that others may also
benefit.

The IRQ context callback is generated through self-IPIs where
possible, or on architectures like powerpc the decrementer (the
built-in timer facility) is set to generate an interrupt immediately.

Architectures that don't have anything like this get to do with a
callback from the timer tick. These architectures can call
irq_work_run() at the tail of any IRQ handlers that might enqueue such
work (like the perf IRQ handler) to avoid undue latencies in
processing the work.

Signed-off-by: Peter Zijlstra 
Acked-by: Kyle McMartin 
Acked-by: Martin Schwidefsky 
[ various fixes ]
Signed-off-by: Huang Ying 
LKML-Reference: <1287036094.7768.291.camel@yhuang-dev>
Signed-off-by: Ingo Molnar

Fix IRQ flag handling naming

2010-10-07T13:08:55+00:00

Fix the IRQ flag handling naming.  In linux/irqflags.h under one configuration,
it maps:

	local_irq_enable() -> raw_local_irq_enable()
	local_irq_disable() -> raw_local_irq_disable()
	local_irq_save() -> raw_local_irq_save()
	...

and under the other configuration, it maps:

	raw_local_irq_enable() -> local_irq_enable()
	raw_local_irq_disable() -> local_irq_disable()
	raw_local_irq_save() -> local_irq_save()
	...

This is quite confusing.  There should be one set of names expected of the
arch, and this should be wrapped to give another set of names that are expected
by users of this facility.

Change this to have the arch provide:

	flags = arch_local_save_flags()
	flags = arch_local_irq_save()
	arch_local_irq_restore(flags)
	arch_local_irq_disable()
	arch_local_irq_enable()
	arch_irqs_disabled_flags(flags)
	arch_irqs_disabled()
	arch_safe_halt()

Then linux/irqflags.h wraps these to provide:

	raw_local_save_flags(flags)
	raw_local_irq_save(flags)
	raw_local_irq_restore(flags)
	raw_local_irq_disable()
	raw_local_irq_enable()
	raw_irqs_disabled_flags(flags)
	raw_irqs_disabled()
	raw_safe_halt()

with type checking on the flags 'arguments', and then wraps those to provide:

	local_save_flags(flags)
	local_irq_save(flags)
	local_irq_restore(flags)
	local_irq_disable()
	local_irq_enable()
	irqs_disabled_flags(flags)
	irqs_disabled()
	safe_halt()

with tracing included if enabled.

The arch functions can now all be inline functions rather than some of them
having to be macros.

Signed-off-by: David Howells  [X86, FRV, MN10300]
Signed-off-by: Chris Metcalf  [Tile]
Signed-off-by: Michal Simek  [Microblaze]
Tested-by: Catalin Marinas  [ARM]
Acked-by: Thomas Gleixner 
Acked-by: Haavard Skinnemoen  [AVR]
Acked-by: Tony Luck  [IA-64]
Acked-by: Hirokazu Takata  [M32R]
Acked-by: Greg Ungerer  [M68K/M68KNOMMU]
Acked-by: Ralf Baechle  [MIPS]
Acked-by: Kyle McMartin  [PA-RISC]
Acked-by: Paul Mackerras  [PowerPC]
Acked-by: Martin Schwidefsky  [S390]
Acked-by: Chen Liqin  [Score]
Acked-by: Matt Fleming  [SH]
Acked-by: David S. Miller  [Sparc]
Acked-by: Chris Zankel  [Xtensa]
Reviewed-by: Richard Henderson  [Alpha]
Reviewed-by: Yoshinori Sato  [H8300]
Cc: starvik@axis.com [CRIS]
Cc: jesper.nilsson@axis.com [CRIS]
Cc: linux-cris-kernel@axis.com

alpha: unb0rk sigsuspend() and rt_sigsuspend()

2010-09-19T03:08:28+00:00

Old code used to set regs->r0 and regs->r19 to force the right
return value.  Leaving that after switch to ERESTARTNOHAND
was a Bad Idea(tm), since now that screws the restart - if we
hit the case when get_signal_to_deliver() returns 0, we will
step back to syscall insn, with v0 set to EINTR and a3 to 1.
The latter won't matter, since EINTR is 4, aka __NR_write.

Testcase:

	#include 
	#define _GNU_SOURCE
	#include 
	#include 

	main()
	{
		sigset_t mask;
		sigemptyset(&mask);
		sigaddset(&mask, SIGCONT);
		sigprocmask(SIG_SETMASK, &mask, NULL);
		kill(0, SIGCONT);
		syscall(__NR_sigsuspend, 1, "b0rken\n", 7);
	}

results on alpha in immediate message to stdout...

Fix is obvious; moreover, since we don't need regs anymore, we can
switch to normal prototypes for these guys and lose the wrappers.
Even better, rt_sigsuspend() is identical to generic version in
kernel/signal.c now.

Tested-by: Michael Cree 
Signed-off-by: Al Viro 
Signed-off-by: Matt Turner

alpha: wire up fanotify and prlimit64 syscalls

2010-09-19T03:06:19+00:00

The 2.6.36-rc kernel added three new system calls:
fanotify_init, fanotify_mark, and prlimit64.  This
patch wires them up on Alpha.

Built and booted on an XP900.  Untested beyond that.

Signed-off-by: Mikael Pettersson 
Signed-off-by: Matt Turner

alpha: fix build breakage in asm/cacheflush.h

2010-09-19T03:06:18+00:00

Alpha SMP flush_icache_user_range() is implemented as an inline
function inside include/asm/cacheflush.h.  It dereferences @current
but doesn't include linux/sched.h and thus causes build failure if
linux/sched.h wasn't included previously.  Fix it by including the
needed header file explicitly.

Signed-off-by: Tejun Heo 
Reported-by: Stephen Rothwell 
Signed-off-by: Matt Turner

alpha: remove homegrown L1_CACHE_ALIGN macro

2010-09-01T02:45:31+00:00

Let's use the standard L1_CACHE_ALIGN macro instead.

Signed-off-by: FUJITA Tomonori 
Signed-off-by: Matt Turner

archs: replace unifdef-y with header-y

2010-08-14T20:26:51+00:00

unifdef-y and header-y have same semantic, so drop unifdef-y

Signed-off-by: Sam Ravnborg