linux-stable.git/arch/arm, branch v3.4.45

mmc: at91/avr32/atmel-mci: fix DMA-channel leak on module unload

2013-05-08T02:51:57+00:00

commit 91cf54feecf815bec0b6a8d6d9dbd0e219f2f2cc upstream.

Fix regression introduced by commit 796211b7953 ("mmc: atmel-mci: add
pdc support and runtime capabilities detection") which removed the need
for CONFIG_MMC_ATMELMCI_DMA but kept the Kconfig-entry as well as the
compile guards around dma_release_channel() in remove(). Consequently,
DMA is always enabled (if supported), but the DMA-channel is not
released on module unload unless the DMA-config option is selected.

Remove the no longer used CONFIG_MMC_ATMELMCI_DMA option completely.

Signed-off-by: Johan Hovold 
Acked-by: Ludovic Desroches 
Signed-off-by: Chris Ball 
Signed-off-by: Greg Kroah-Hartman

arm: set the page table freeing ceiling to TASK_SIZE

2013-05-08T02:51:53+00:00

commit 104ad3b32d7a71941c8ab2dee78eea38e8a23309 upstream.

ARM processors with LPAE enabled use 3 levels of page tables, with an
entry in the top level (pgd) covering 1GB of virtual space.  Because of
the branch relocation limitations on ARM, the loadable modules are
mapped 16MB below PAGE_OFFSET, making the corresponding 1GB pgd shared
between kernel modules and user space.

If free_pgtables() is called with the default ceiling 0,
free_pgd_range() (and subsequently called functions) also frees the page
table shared between user space and kernel modules (which is normally
handled by the ARM-specific pgd_free() function).  This patch changes
defines the ARM USER_PGTABLES_CEILING to TASK_SIZE when CONFIG_ARM_LPAE
is enabled.

Note that the pgd_free() function already checks the presence of the
shared pmd page allocated by pgd_alloc() and frees it, though with
ceiling 0 this wasn't necessary.

Signed-off-by: Catalin Marinas 
Cc: Russell King 
Cc: Hugh Dickins 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

ARM: at91: Fix typo in restart code panic message

2013-05-08T02:51:52+00:00

commit e7619459d47a673af3433208a42f583af920e9db upstream.

Signed-off-by: Maxime Ripard 
Acked-by: Jean-Christophe PLAGNIOL-VILLARD 
Signed-off-by: Nicolas Ferre 
Signed-off-by: Greg Kroah-Hartman

ARM: 7698/1: perf: fix group validation when using enable_on_exec

2013-04-26T04:19:55+00:00

commit cb2d8b342aa084d1f3ac29966245dec9163677fb upstream.

Events may be created with attr->disabled == 1 and attr->enable_on_exec
== 1, which confuses the group validation code because events with the
PERF_EVENT_STATE_OFF are not considered candidates for scheduling, which
may lead to failure at group scheduling time.

This patch fixes the validation check for ARM, so that events in the
OFF state are still considered when enable_on_exec is true.

Reported-by: Sudeep KarkadaNagesha 
Cc: Peter Zijlstra 
Cc: Arnaldo Carvalho de Melo 
Cc: Jiri Olsa 
Signed-off-by: Will Deacon 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

ARM: 7696/1: Fix kexec by setting outer_cache.inv_all for Feroceon

2013-04-26T04:19:55+00:00

commit cd272d1ea71583170e95dde02c76166c7f9017e6 upstream.

On Feroceon the L2 cache becomes non-coherent with the CPU
when the L1 caches are disabled. Thus the L2 needs to be invalidated
after both L1 caches are disabled.

On kexec before the starting the code for relocation the kernel,
the L1 caches are disabled in cpu_froc_fin (cpu_v7_proc_fin for Feroceon),
but after L2 cache is never invalidated, because inv_all is not set
in cache-feroceon-l2.c.
So kernel relocation and decompression may has (and usually has) errors.
Setting the function enables L2 invalidation and fixes the issue.

Signed-off-by: Illia Ragozin 
Acked-by: Jason Cooper 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

ARM: Do 15e0d9e37c (ARM: pm: let platforms select cpu_suspend support) properly

2013-04-26T04:19:54+00:00

commit b6c7aabd923a17af993c5a5d5d7995f0b27c000a upstream.

Let's do the changes properly and fix the same problem everywhere, not
just for one case.

Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

ARM: cns3xxx: fix mapping of private memory region

2013-04-05T17:04:35+00:00

commit a3d9052c6296ad3398d3ad649c3c682c3e7ecfa6 upstream.

Since commit 0536bdf33faf (ARM: move iotable mappings within the vmalloc
region), the Cavium CNS3xxx cannot boot anymore.

This is caused by the pre-defined iotable mappings is not in the vmalloc
region. This patch move the iotable mappings into the vmalloc region, and
merge the MPCore private memory region (containing the SCU, the GIC and
the TWD) as a single region.

Signed-off-by: Mac Lin 
Signed-off-by: Anton Vorontsov 
Signed-off-by: Greg Kroah-Hartman

signal: Define __ARCH_HAS_SA_RESTORER so we know whether to clear sa_restorer

2013-04-05T17:04:14+00:00

Vaguely based on upstream commit 574c4866e33d 'consolidate kernel-side
struct sigaction declarations'.

flush_signal_handlers() needs to know whether sigaction::sa_restorer
is defined, not whether SA_RESTORER is defined.  Define the
__ARCH_HAS_SA_RESTORER macro to indicate this.

Signed-off-by: Ben Hutchings 
Cc: Al Viro 
Signed-off-by: Greg Kroah-Hartman

ARM: 7663/1: perf: fix ARMv7 EVTYPE_MASK to include NSH bit

2013-03-14T18:29:50+00:00

commit f2fe09b055e2549de41fb107b34c60bac4a1b0cf upstream.

Masked out PMXEVTYPER.NSH means that we can't enable profiling at PL2,
regardless of the settings in the HDCR.

This patch fixes the broken mask.

Reported-by: Christoffer Dall 
Signed-off-by: Will Deacon 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

ARM: fix scheduling while atomic warning in alignment handling code

2013-03-14T18:29:41+00:00

commit b255188f90e2bade1bd11a986dd1ca4861869f4d upstream.

Paolo Pisati reports that IPv6 triggers this warning:

BUG: scheduling while atomic: swapper/0/0/0x40000100
Modules linked in:
[] (unwind_backtrace+0x0/0xf0) from [] (__schedule_bug+0x48/0x5c)
[] (__schedule_bug+0x48/0x5c) from [] (__schedule+0x700/0x740)
[] (__schedule+0x700/0x740) from [] (__cond_resched+0x24/0x34)
[] (__cond_resched+0x24/0x34) from [] (_cond_resched+0x3c/0x44)
[] (_cond_resched+0x3c/0x44) from [] (do_alignment+0x178/0x78c)
[] (do_alignment+0x178/0x78c) from [] (do_DataAbort+0x34/0x98)
[] (do_DataAbort+0x34/0x98) from [] (__dabt_svc+0x40/0x60)
Exception stack(0xc0763d70 to 0xc0763db8)
3d60:                                     e97e805e e97e806e 2c000000 11000000
3d80: ea86bb00 0000002c 00000011 e97e807e c076d2a8 e97e805e e97e806e 0000002c
3da0: 3d000000 c0763dbc c04b98fc c02a8490 00000113 ffffffff
[] (__dabt_svc+0x40/0x60) from [] (__csum_ipv6_magic+0x8/0xc8)

Fix this by using probe_kernel_address() stead of __get_user().

Reported-by: Paolo Pisati 
Tested-by: Paolo Pisati 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman