linux-stable.git/arch/xtensa/kernel, branch v3.11.2

xtensa: Fix broken allmodconfig build

2013-09-27T00:21:22+00:00

commit 8872366df396444d7655287c79ed182d8f47cba6 upstream.

xtansa allmodbuild fails with:

arch/xtensa/kernel/xtensa_ksyms.c:129:1: error: '_mcount' undeclared here (not in a function)
make[2]: *** [arch/xtensa/kernel/xtensa_ksyms.o] Error 1
make[1]: *** [arch/xtensa/kernel] Error 2

The breakage is due to commit 478ba61af (xtensa: add static function tracer
support) which exports _mcount without declaring it.

Cc: Max Filippov 
Signed-off-by: Guenter Roeck 
Signed-off-by: Chris Zankel 
Signed-off-by: Greg Kroah-Hartman

xtensa: delete __cpuinit usage from all xtensa files

2013-07-14T23:36:56+00:00

The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications.  For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.

After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out.  Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.

Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
are flagged as __cpuinit  -- so if we remove the __cpuinit from
arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
content into no-ops as early as possible, since that will get rid
of these warnings.  In any case, they are temporary and harmless.

This removes all the arch/xtensa uses of the __cpuinit macros from
all C files.  Currently xtensa does not have any __CPUINIT used in
assembly files.

[1] https://lkml.org/lkml/2013/5/20/589

Cc: Chris Zankel 
Cc: Max Filippov 
Cc: linux-xtensa@linux-xtensa.org
Signed-off-by: Paul Gortmaker

xtensa: add static function tracer support

2013-07-08T08:18:57+00:00

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: Flat DeviceTree copy not future-safe

2013-07-08T08:18:57+00:00

flat DT copy code calls bootmem allocator with @align = 0.
This is probably OK with legacy allocator which xtensa uses right now,
but this will panic right away with memblock allocator

Signed-off-by: Vineet Gupta 
Cc: Chris Zankel 
Cc: Max Filippov 
Cc: Marc Gauthier 
Cc: linux-xtensa@linux-xtensa.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Max Filippov 
Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: check TLB sanity on return to userspace

2013-07-08T08:18:56+00:00

- check that user TLB mappings correspond to the current page table;
- check that TLB mapping VPN is in the kernel/user address range
  in accordance with its ASID.

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: adjust boot parameters address when INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX is selected

2013-07-08T08:18:56+00:00

The virtual address of boot parameters chain is passed to the kernel via
a2 register. Adjust it in case it is remapped during MMUv3 -> MMUv2
mapping change, i.e. when it is in the first 128M.

Also fix interpretation of initrd and FDT addresses passed in the boot
parameters: these are physical addresses.

Cc: stable@vger.kernel.org
Reported-by: Baruch Siach 
Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: ccount based sched_clock

2013-07-08T08:11:38+00:00

Signed-off-by: Baruch Siach 
Signed-off-by: Chris Zankel

xtensa: ccount based clockevent implementation

2013-07-08T08:11:38+00:00

Reused some code from a preliminary implementation by Max Fillippov.

Cc: Max Filippov 
Signed-off-by: Baruch Siach 
Signed-off-by: Chris Zankel

xtensa: cleanup ccount frequency tracking

2013-07-08T08:11:37+00:00

Remove unused nsec_per_ccount, and rename ccount_per_jiffy to ccount_preq.

Signed-off-by: Baruch Siach 
Signed-off-by: Chris Zankel

xtensa: fix section mismatch in pcibios_fixup_bus

2013-06-05T17:14:22+00:00

Remove __init annotation from pcibios_fixup_bus as is called from
pci_scan_child_bus which is not __init.

Also fix a couple of minor build warnings.

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel