linux-stable.git/arch/arm/include, branch v2.6.38 Linux kernel stable tree ARM: 6765/1: remove obsolete comment from asm/mach/arch.h 2011-02-26T13:33:47+00:00 Nicolas Pitre nicolas.pitre@linaro.org 2011-02-24T21:57:14+00:00 8f3112707fabc2f9f932a4ac1c5b92f3266e4662 Since commit 6fc31d54 this comment is no longer true. Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Since commit 6fc31d54 this comment is no longer true.

Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 6757/1: fix tlb.h induced linux/swap.h build failure 2011-02-23T16:19:21+00:00 Uwe Kleine-König u.kleine-koenig@pengutronix.de 2011-02-22T22:29:37+00:00 97594b0f35c0708cb9551c070b9693a52ec24ebf Commit 06824ba (ARM: tlb: delay page freeing for SMP and ARMv7 CPUs) introduced a build failure for builds with CONFIG_SWAP=n: In file included from arch/arm/mm/init.c:27: arch/arm/include/asm/tlb.h: In function 'tlb_flush_mmu': arch/arm/include/asm/tlb.h:101: error: implicit declaration of function 'release_pages' arch/arm/include/asm/tlb.h: In function 'tlb_remove_page': arch/arm/include/asm/tlb.h:165: error: implicit declaration of function 'page_cache_release' as linux/swap.h doesn't include linux/pagemap.h but actually needs it (see comments in linux/swap.h as to why this is.) Fix that by #including <linux/pagemap.h> in <asm/pgalloc.h> as it's done by x86. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Commit

	06824ba (ARM: tlb: delay page freeing for SMP and ARMv7 CPUs)

introduced a build failure for builds with CONFIG_SWAP=n:

	In file included from arch/arm/mm/init.c:27:
	arch/arm/include/asm/tlb.h: In function 'tlb_flush_mmu':
	arch/arm/include/asm/tlb.h:101: error: implicit declaration of function 'release_pages'
	arch/arm/include/asm/tlb.h: In function 'tlb_remove_page':
	arch/arm/include/asm/tlb.h:165: error: implicit declaration of function 'page_cache_release'

as linux/swap.h doesn't include linux/pagemap.h but actually needs it
(see comments in linux/swap.h as to why this is.)

Fix that by #including <linux/pagemap.h> in <asm/pgalloc.h> as it's done
by x86.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: tlb: move noMMU tlb_flush() to asm/tlb.h 2011-02-21T19:29:28+00:00 Russell King rmk+kernel@arm.linux.org.uk 2011-02-20T12:27:49+00:00 58e9c47fa0dd76693b2c85c010c7430a4de77c6d There's no need to noMMU to put tlb_flush() in asm/tlbflush.h - it's part of the tlb shootdown interface. Move it to asm/tlb.h instead, as per x86. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
There's no need to noMMU to put tlb_flush() in asm/tlbflush.h - it's
part of the tlb shootdown interface.  Move it to asm/tlb.h instead, as
per x86.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: tlb: delay page freeing for SMP and ARMv7 CPUs 2011-02-21T19:29:28+00:00 Russell King rmk+kernel@arm.linux.org.uk 2011-02-20T12:16:45+00:00 06824ba824b3e9f2fedb38bee79af0643198ed7f We need to delay freeing any mapped page on SMP and ARMv7 systems to ensure that the data is not accessed by other CPUs, or is used for speculative prefetch with ARMv7. This includes not only mapped pages but also pages used for the page tables themselves. This avoids races with the MMU/other CPUs accessing pages after they've been freed but before we've invalidated the TLB. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
We need to delay freeing any mapped page on SMP and ARMv7 systems to
ensure that the data is not accessed by other CPUs, or is used for
speculative prefetch with ARMv7.  This includes not only mapped pages
but also pages used for the page tables themselves.

This avoids races with the MMU/other CPUs accessing pages after they've
been freed but before we've invalidated the TLB.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 6722/1: SPEAr: sp810: switch to slow mode before reset 2011-02-21T19:29:24+00:00 Shiraz Hashim shiraz.hashim@st.com 2011-02-16T06:40:29+00:00 b8272a61c16decd4c8627fc1181bdd174c922c3f In sysctl_soft_reset(), switch to slow mode before resetting the system via the system controller. This is required. Reviewed-by: Stanley Miao <stanley.miao@windriver.com> Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
In sysctl_soft_reset(), switch to slow mode before resetting the system
via the system controller.  This is required.

Reviewed-by: Stanley Miao <stanley.miao@windriver.com>
Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 6741/1: errata: pl310 cache sync operation may be faulty 2011-02-19T11:23:21+00:00 Srinidhi Kasagar srinidhi.kasagar@stericsson.com 2011-02-17T06:03:51+00:00 885028e4ba4caf49d565c96481e1a05220ecb517 The effect of cache sync operation is to drain the store buffer and wait for all internal buffers to be empty. In normal conditions, store buffer is able to merge the normal memory writes within its 32-byte data buffers. Due to this erratum present in r3p0, the effect of cache sync operation on the store buffer still remains when the operation completes. This means that the store buffer is always asked to drain and this prevents it from merging any further writes. This can severely affect performance on the write traffic esp. on Normal memory NC one. The proposed workaround is to replace the normal offset of cache sync operation(0x730) by another offset targeting an unmapped PL310 register 0x740. Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
The effect of cache sync operation is to drain the store buffer and
wait for all internal buffers to be empty. In normal conditions, store
buffer is able to merge the normal memory writes within its 32-byte
data buffers.  Due to this erratum present in r3p0, the effect of cache
sync operation on the store buffer still remains when the operation
completes. This means that the store buffer is always asked to drain
and this prevents it from merging any further writes.

This can severely affect performance on the write traffic esp. on
Normal memory NC one.

The proposed workaround is to replace the normal offset of cache sync
operation(0x730) by another offset targeting an unmapped PL310
register 0x740.

Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: io: ensure inb/outb() et.al. are properly ordered on ARMv6+ 2011-01-31T10:53:42+00:00 Russell King rmk+kernel@arm.linux.org.uk 2011-01-30T11:29:40+00:00 c1928022ef94662a88329e35fa0968b1be328b8e Ensure that the ISA/PCI IO space accessors are properly ordered on ARMv6+ architectures. These should always be ordered with respect to all other accesses. This also fixes __iormb() and __iowmb() not being visible to ioread/ iowrite if a platform defines its own MMIO accessors. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Ensure that the ISA/PCI IO space accessors are properly ordered on
ARMv6+ architectures.  These should always be ordered with respect to
all other accesses.

This also fixes __iormb() and __iowmb() not being visible to ioread/
iowrite if a platform defines its own MMIO accessors.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 6637/1: Make the argument to virt_to_phys() "const volatile" 2011-01-25T21:18:03+00:00 Catalin Marinas catalin.marinas@arm.com 2011-01-25T10:18:25+00:00 05b112ff98070dc1f3293e8cd8e4c6f468d1084a Changing the virt_to_phys() argument to "const volatile void *" avoids compiler warnings in some situations where this function is used. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Changing the virt_to_phys() argument to "const volatile void *" avoids
compiler warnings in some situations where this function is used.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 6635/2: Configure reference clock for Versatile Express timers 2011-01-25T16:18:33+00:00 Pawel Moll pawel.moll@arm.com 2011-01-25T14:53:03+00:00 baaece224570a935210a59257b5d9073e99843ea Timers on Versatile Express mainboard are used as system clock/event sources. Driver assumes that they are clocked with 1MHz signal. Old V2M firmware apparently configured it by default, but on newer boards one can observe that "sleep 1" command takes over 30 seconds to finish, as the timers are fed with 32kHz instead... This patch performs required magic and also removes code clearing timer's control registers, as exactly the same operations are performed by the timer driver few jiffies later. Signed-off-by: Pawel Moll <pawel.moll@arm.com> Tested-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Timers on Versatile Express mainboard are used as system clock/event
sources. Driver assumes that they are clocked with 1MHz signal.
Old V2M firmware apparently configured it by default, but on newer
boards one can observe that "sleep 1" command takes over 30 seconds
to finish, as the timers are fed with 32kHz instead...

This patch performs required magic and also removes code clearing
timer's control registers, as exactly the same operations are
performed by the timer driver few jiffies later.

Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Merge branch 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm 2011-01-15T20:29:50+00:00 Linus Torvalds torvalds@linux-foundation.org 2011-01-15T20:29:50+00:00 65e5d002b5ad220db2bf9557f53de5a98f7dab86 * 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm: ARM: fix missing branch in __error_a ARM: fix /proc/$PID/stack on SMP ARM: Fix build regression on SA11x0, PXA, and H720x targets ARM: 6625/1: use memblock memory regions for "System RAM" I/O resources ARM: fix wrongly patched constants ARM: 6624/1: fix dependency for CONFIG_SMP_ON_UP ARM: 6623/1: Thumb-2: Fix out-of-range offset for Thumb-2 in proc-v7.S ARM: 6622/1: fix dma_unmap_sg() documentation ARM: 6621/1: bitops: remove condition code clobber for CLZ ARM: 6620/1: Change misleading warning when CONFIG_CMDLINE_FORCE is used ARM: 6619/1: nommu: avoid mapping vectors page when !CONFIG_MMU ARM: sched_clock: make minsec argument to clocks_calc_mult_shift() zero ARM: sched_clock: allow init_sched_clock() to be called early ARM: integrator: fix compile warning in cpu.c ARM: 6616/1: Fix ep93xx-fb init/exit annotations ARM: twd: fix display of twd frequency ARM: udelay: prevent math rounding resulting in short udelays 
* 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm:
  ARM: fix missing branch in __error_a
  ARM: fix /proc/$PID/stack on SMP
  ARM: Fix build regression on SA11x0, PXA, and H720x targets
  ARM: 6625/1: use memblock memory regions for "System RAM" I/O resources
  ARM: fix wrongly patched constants
  ARM: 6624/1: fix dependency for CONFIG_SMP_ON_UP
  ARM: 6623/1: Thumb-2: Fix out-of-range offset for Thumb-2 in proc-v7.S
  ARM: 6622/1: fix dma_unmap_sg() documentation
  ARM: 6621/1: bitops: remove condition code clobber for CLZ
  ARM: 6620/1: Change misleading warning when CONFIG_CMDLINE_FORCE is used
  ARM: 6619/1: nommu: avoid mapping vectors page when !CONFIG_MMU
  ARM: sched_clock: make minsec argument to clocks_calc_mult_shift() zero
  ARM: sched_clock: allow init_sched_clock() to be called early
  ARM: integrator: fix compile warning in cpu.c
  ARM: 6616/1: Fix ep93xx-fb init/exit annotations
  ARM: twd: fix display of twd frequency
  ARM: udelay: prevent math rounding resulting in short udelays