linux-stable.git/arch, branch v3.2.52

mm, show_mem: suppress page counts in non-blockable contexts

2013-10-26T20:06:13+00:00

commit 4b59e6c4730978679b414a8da61514a2518da512 upstream.

On large systems with a lot of memory, walking all RAM to determine page
types may take a half second or even more.

In non-blockable contexts, the page allocator will emit a page allocation
failure warning unless __GFP_NOWARN is specified.  In such contexts, irqs
are typically disabled and such a lengthy delay may even result in NMI
watchdog timeouts.

To fix this, suppress the page walk in such contexts when printing the
page allocation failure warning.

Signed-off-by: David Rientjes 
Cc: Mel Gorman 
Acked-by: Michal Hocko 
Cc: Dave Hansen 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Ben Hutchings

powerpc/pseries/lparcfg: Fix possible overflow are more than 1026

2013-10-26T20:06:11+00:00

commit 5676005acf26ab7e924a8438ea4746e47d405762 upstream.

need set '\0' for 'local_buffer'.

SPLPAR_MAXLENGTH is 1026, RTAS_DATA_BUF_SIZE is 4096. so the contents of
rtas_data_buf may truncated in memcpy.

if contents are really truncated.
  the splpar_strlen is more than 1026. the next while loop checking will
  not find the end of buffer. that will cause memory access violation.

Signed-off-by: Chen Gang 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Ben Hutchings

m68knommu: clean up linker script

2013-10-26T20:06:11+00:00

commit f84f52a5c15db7d14a534815f27253b001735183 upstream.

There is a lot of years of collected cruft in the m68knommu linker script.
Clean it all up and use the well defined linker script support macros.

Support is maintained for building both ROM/FLASH based and RAM based setups.
No major changes to section layouts, though the rodata section is now lumped
in with the read/write data section.

Signed-off-by: Greg Ungerer 
Signed-off-by: Ben Hutchings

m68k: use non-MMU linker script for ColdFire MMU builds

2013-10-26T20:06:11+00:00

commit ed865e31a8273be200db9ddcdb6b844e48777abd upstream.

Use the non-MMU linker script for ColdFire builds when we are building
for MMU enabled. The image layout is correct for loading on existing
ColdFire dev boards. The only addition required to the current non-MMU
linker script is to add support for the fixup section.

Signed-off-by: Greg Ungerer 
Acked-by: Geert Uytterhoeven 
Acked-by: Matt Waddel 
Acked-by: Kurt Mahan 
Signed-off-by: Ben Hutchings

m68k: consolidate the vmlinux.lds linker scripts

2013-10-26T20:06:10+00:00

commit 40c1b9cfeedf79b909c961e0e00a13497e80bc82 upstream.

The merge of m68knommu left the linker scripts a little disorganized.
Some consistent naming and squashing two of scripts that just include
others can simplify things a lot.

So merge the two simple including scripts, and rename the nommu script
to be consistent with the existing m68k linker scripts.

Signed-off-by: Greg Ungerer 
Signed-off-by: Ben Hutchings

sparc32: Fix exit flag passed from traced sys_sigreturn

2013-10-26T20:06:10+00:00

[ Upstream commit 7a3b0f89e3fea680f93932691ca41a68eee7ab5e ]

Pass 1 in %o1 to indicate that syscall_trace accounts exit.

Signed-off-by: Kirill Tkhai 
CC: David Miller 
Signed-off-by: David S. Miller 
Signed-off-by: Ben Hutchings

sparc64: Fix not SRA'ed %o5 in 32-bit traced syscall

2013-10-26T20:06:10+00:00

[ Upstream commit ab2abda6377723e0d5fbbfe5f5aa16a5523344d1 ]

(From v1 to v2: changed comment)

On the way linux_sparc_syscall32->linux_syscall_trace32->goto 2f,
register %o5 doesn't clear its second 32-bit.

Fix that.

Signed-off-by: Kirill Tkhai 
CC: David Miller 
Signed-off-by: David S. Miller 
Signed-off-by: Ben Hutchings

sparc64: Fix off by one in trampoline TLB mapping installation loop.

2013-10-26T20:06:10+00:00

[ Upstream commit 63d499662aeec1864ec36d042aca8184ea6a938e ]

Reported-by: Kirill Tkhai 
Signed-off-by: David S. Miller 
Signed-off-by: Ben Hutchings

sparc64: Remove RWSEM export leftovers

2013-10-26T20:06:09+00:00

[ Upstream commit 61d9b9355b0d427bd1e732bd54628ff9103e496f ]

The functions

			__down_read
			__down_read_trylock
			__down_write
			__down_write_trylock
			__up_read
			__up_write
			__downgrade_write

are implemented inline, so remove corresponding EXPORT_SYMBOLs
(They lead to compile errors on RT kernel).

Signed-off-by: Kirill Tkhai 
CC: David Miller 
Signed-off-by: David S. Miller 
Signed-off-by: Ben Hutchings

sparc64: Fix ITLB handler of null page

2013-10-26T20:06:09+00:00

[ Upstream commit 1c2696cdaad84580545a2e9c0879ff597880b1a9 ]

1)Use kvmap_itlb_longpath instead of kvmap_dtlb_longpath.

2)Handle page #0 only, don't handle page #1: bleu -> blu

 (KERNBASE is 0x400000, so #1 does not exist too. But everything
  is possible in the future. Fix to not to have problems later.)

3)Remove unused kvmap_itlb_nonlinear.

Signed-off-by: Kirill Tkhai 
CC: David Miller 
Signed-off-by: David S. Miller 
Signed-off-by: Ben Hutchings