linux.git/arch/arm/kernel, branch v2.6.33

ARM: 5938/1: ARM: L2: export outer_cache_fns

2010-02-18T16:27:39+00:00

The 'outer_cache' variable is needed by the outer_inv_range(),
outer_clean_range() and outer_flush_range() functions, which are
declared as inline in asm/cacheflush.h.  Otherwise drivers built
as a loadable module, which access these functions, will have
an undefined symbol.

Signed-off-by: Santosh Shilimkar 
Signed-off-by: Russell King

ARM: 5884/1: arm: Fix DCC console for v7

2010-01-19T20:23:16+00:00

Without this patch arch/arm/compressed/head.S defaults to generic
DCC code that does not work for v7.

For more information on the v7 DCC, see Cortex-A8 TRM
"12.11.1 Debug communications channel".

To use it with post 2.6.33-rc1 or later, you need to have:

CONFIG_DEBUG_LL=y
ONFIG_DEBUG_ICEDCC=y
CONFIG_EARLY_PRINTK=y

Earlier kernels need commit 93fd03a8c6728b58879f8af20ffd55d9c32a778b
backported.

Tested on omap3430.

Signed-off-by: Tony Lindgren 
Signed-off-by: Russell King

ARM: 5883/1: Revert "disable NX support for OABI-supporting kernels"

2010-01-18T14:12:11+00:00

This reverts commit 14f0aa359365e8a93a77b71e3b840274b9b4dcb1.

That commit was needed earlier because system call restarting for
OABI (compat) required an executable stack and thus had problems
with NX.  Since ab72b00734ae4d0b ("ARM: Fix signal restart issues
with NX and OABI compat") has reworked the code to not require an
executable stack anymore, we can re-enable NX support for kernels
with OABI (compat) support.

Signed-off-by: Rabin Vincent 
Signed-off-by: Russell King

ARM: Fix wrong dmb

2010-01-12T18:59:16+00:00

The __kuser_cmpxchg code uses an ARMv6 dmb instruction, rather than
one based upon the architecture being built for.  Switch to using
the macro provided for this purpose, which also eliminates the
need for an ifdef.

Acked-by: Nicolas Pitre 
Signed-off-by: Russell King

ARM: 5868/1: ARM: fix "BUG: using smp_processor_id() in preemptible code"

2010-01-08T16:14:29+00:00

Fix the following warning, which appears when the register dump for a
faulting process is printed in a kernel with SMP, DEBUG_PREEMPT, and
DEBUG_USER (with user_debug=31) enabled:

BUG: using smp_processor_id() in preemptible [00000000] code: init/1
caller is __show_regs+0x18/0x234
Backtrace:
[] (dump_backtrace+0x0/0x114) from [] (dump_stack+0x18/0x1c)
 r6:c781a000 r5:c0157544 r4:00000001 r3:00000000
[] (dump_stack+0x0/0x1c) from [] (debug_smp_processor_id+0xc4/0xf8)
[] (debug_smp_processor_id+0x0/0xf8) from [] (__show_regs+0x18/0x234)
 r6:c781bfb0 r5:00000000 r4:c781bfb0 r3:00000000
[] (__show_regs+0x0/0x234) from [] (show_regs+0x40/0x50)
[] (show_regs+0x0/0x50) from [] (__do_user_fault+0x5c/0xa4)
 r4:c781c000 r3:00000000
[] (__do_user_fault+0x0/0xa4) from [] (do_page_fault+0x1b4/0x1e4)
 r7:00000000 r6:00010000 r5:c781bfb0 r4:c781c000
[] (do_page_fault+0x0/0x1e4) from [] (do_DataAbort+0x3c/0xa0)
[] (do_DataAbort+0x0/0xa0) from [] (ret_from_exception+0x0/0x10)

Signed-off-by: Rabin Vincent 
Signed-off-by: Russell King

ARM: dma-isa: request cascade channel after registering it

2009-12-24T18:34:08+00:00

We can't request the cascade channel before it's been registered, so
move it afterwards.

Signed-off-by: Russell King

ARM: Convert VFP/Crunch/XscaleCP thread_release() to exit_thread()

2009-12-18T14:53:41+00:00

This avoids races in the VFP code where the dead thread may have
state on another CPU.  By moving this code to exit_thread(), we
will be running as the thread, and therefore be running on the
current CPU.

This means that we can ensure that the only local state is accessed
in the thread notifiers.

Acked-by: Catalin Marinas 
Signed-off-by: Russell King

Merge branch 'module' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus

2009-12-16T18:47:24+00:00

* 'module' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  modpost: fix segfault with short symbol names
  module: handle ppc64 relocating kcrctabs when CONFIG_RELOCATABLE=y
  Kbuild: clear marker out of modpost
  module: make MODULE_SYMBOL_PREFIX into a CONFIG option
  ARM: unexport symbols used to implement floating point emulation
  ARM: use unified discard definition in linker script
  x86: don't export inline function
  sparc64: don't export static inline pci_ functions

ARM: unexport symbols used to implement floating point emulation

2009-12-15T05:58:22+00:00

The Kconfigs for in-tree floating point emulation do not allow building
as modules. That leaves the Acorn FPEmulator module. I found two public
releases of this as a binary module for 2.1 and 2.2 kernels, optimized
for ARMV4.[1] If there is a resurgence of interest in this, the symbols
can always be re-exported.

This allows the EXPORT_SYMBOL_ALIAS() hack to be removed. The ulterior
motive here is that EXPORT_SYMBOL_ALIAS() makes it harder to sort the
resulting kernel symbol tables.  Sorted symbol tables will allow faster
symbol resolution during module loading.

Note that fp_send_sigs() and fp_printk() are simply aliases for existing
exports and add no obvious value.  Similarly fp_enter could easily be
renamed to kern_fp_enter at the point of definition. Therefore removing
EXPORT_SYMBOL_ALIAS will not serve as a material obstacle to re-adding
the exports should they be desired in future.

Build tested only.

[1] http://ftp.arm.linux.org.uk/pub/linux/arm/fpemulator/

Signed-off-by: Alan Jenkins 
CC: Russell King 
Signed-off-by: Rusty Russell

ARM: use unified discard definition in linker script

2009-12-15T05:58:18+00:00

Commit 023bf6f "linker script: unify usage of discard definition"
changed the linker scripts for all architectures except for ARM.
I can find no discussion about this ommision, so here are the changes
for ARM.

These changes are exactly parallel to the ia64 case.

"ia64 is notable because it first throws away some ia64 specific
 subsections and then include the rest of the sections into the final
 image, so those sections must be discarded before the inclusion."

Not boot-tested.  In build testing, the modified linker script generated
an identical vmlinux file.

[I would like to be able to rely on this unified discard definition.
 I want to sort the kernel symbol tables to allow faster symbol
 resolution during module loading. The simplest way appears to be
 to generate sorted versions from vmlinux.o, link them in to vmlinux,
 _and discard the original unsorted tables_.

 This work is driven by my x86 netbook, but it is implemented at a
 generic level. It is possible it will benefit some ARM systems also.]

Signed-off-by: Alan Jenkins 
Acked-by: Russell King 
Acked-by-without-testing: Tejun Heo 
Signed-off-by: Rusty Russell