linux-stable.git/arch/mips/kernel, branch v3.5.7

kbuild: Fix gcc -x syntax

2012-10-12T20:46:52+00:00

commit b1e0d8b70fa31821ebca3965f2ef8619d7c5e316 upstream.

The correct syntax for gcc -x is "gcc -x assembler", not
"gcc -xassembler". Even though the latter happens to work, the former
is what is documented in the manual page and thus what gcc wrappers
such as icecream do expect.

This isn't a cosmetic change. The missing space prevents icecream from
recognizing compilation tasks it can't handle, leading to silent kernel
miscompilations.

Besides me, credits go to Michael Matz and Dirk Mueller for
investigating the miscompilation issue and tracking it down to this
incorrect -x parameter syntax.

Signed-off-by: Jean Delvare 
Acked-by: Ingo Molnar 
Cc: Bernhard Walle 
Cc: Michal Marek 
Cc: Ralf Baechle 
Signed-off-by: Michal Marek 
Signed-off-by: Greg Kroah-Hartman

posix_types.h: Cleanup stale __NFDBITS and related definitions

2012-08-09T15:23:11+00:00

commit 8ded2bbc1845e19c771eb55209aab166ef011243 upstream.

Recently, glibc made a change to suppress sign-conversion warnings in
FD_SET (glibc commit ceb9e56b3d1).  This uncovered an issue with the
kernel's definition of __NFDBITS if applications #include
 after including .  A build failure would
be seen when passing the -Werror=sign-compare and -D_FORTIFY_SOURCE=2
flags to gcc.

It was suggested that the kernel should either match the glibc
definition of __NFDBITS or remove that entirely.  The current in-kernel
uses of __NFDBITS can be replaced with BITS_PER_LONG, and there are no
uses of the related __FDELT and __FDMASK defines.  Given that, we'll
continue the cleanup that was started with commit 8b3d1cda4f5f
("posix_types: Remove fd_set macros") and drop the remaining unused
macros.

Additionally, linux/time.h has similar macros defined that expand to
nothing so we'll remove those at the same time.

Reported-by: Jeff Law 
Suggested-by: Linus Torvalds 
Signed-off-by: Josh Boyer 
[ .. and fix up whitespace as per akpm ]
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

MIPS: sync-r4k: remove redundant irq operation

2012-07-19T09:23:44+00:00

Since we have delayed irq enabling to ->smp_finish()

Signed-off-by: Yong Zhang 
Cc: Sergei Shtylyov 
Cc: David Daney 
Acked-by: David Daney 
Signed-off-by: Ralf Baechle

MIPS: smp: Warn on too early irq enable

2012-07-19T09:23:44+00:00

Just to catch a potential issue.

Signed-off-by: Yong Zhang 
Cc: Sergei Shtylyov 
Cc: David Daney 
Acked-by: David Daney 
Patchwork: https://patchwork.linux-mips.org/patch/3852/
Signed-off-by: Ralf Baechle

MIPS: call set_cpu_online() on cpu being brought up with irq disabled

2012-07-19T09:23:44+00:00

To prevent a problem as commit 5fbd036b [sched: Cleanup cpu_active madness]
and commit 2baab4e9 [sched: Fix select_fallback_rq() vs cpu_active/cpu_online]
try to resolve, move set_cpu_online() to the brought up CPU and with irq
disabled.

Signed-off-by: Yong Zhang 
Cc: Sergei Shtylyov 
Cc: David Daney 
Acked-by: David Daney 
Patchwork: https://patchwork.linux-mips.org/patch/3851/
Signed-off-by: Ralf Baechle

MIPS: call ->smp_finish() a little late

2012-07-19T09:23:44+00:00

We have move irq enable to ->smp_finish. Place ->smp_finish() a little
late to prepare for move set_cpu_online() into start_secondary.
And it's not necessary to call cpu_set(cpu, cpu_callin_map) and
synchronise_count_slave() with irq enabled.

Signed-off-by: Yong Zhang 
Cc: Sergei Shtylyov 
Cc: David Daney 
Acked-by: David Daney 
Patchwork: https://patchwork.linux-mips.org/patch/3850/
Signed-off-by: Ralf Baechle

MIPS: SMTC: delay irq enable to ->smp_finish()

2012-07-19T09:23:44+00:00

To prepare for smoothing set_cpu_[active|online]() mess up

Signed-off-by: Yong Zhang 
Cc: Sergei Shtylyov 
Cc: David Daney 
Acked-by: David Daney 
Patchwork: https://patchwork.linux-mips.org/patch/3847/
Signed-off-by: Ralf Baechle

MIPS: BMIPS: delay irq enable to ->smp_finish()

2012-07-19T09:23:44+00:00

To prepare for smoothing set_cpu_[active|online]() mess up

Signed-off-by: Yong Zhang 
Cc: Sergei Shtylyov 
Cc: David Daney 
Acked-by: David Daney 
Patchwork: https://patchwork.linux-mips.org/patch/3846/
Signed-off-by: Ralf Baechle

MIPS: Oprofile: Fix build as a module.

2012-07-19T09:23:44+00:00

When building oprofile as a module for R10000 or R7000 class processors,
E9000 or MIPSxx class cores since 3572a2c37f667ee49333f8863722b8f43eac506b
[MIPS: make oprofile use cp0_perfcount_irq if it is set] an

ERROR: "cp0_compare_irq" [arch/mips/oprofile/oprofile.ko] undefined!

error will happen.  Fixed by exporting cp0_compare_irq.

Signed-off-by: Ralf Baechle

MIPS: perf: Fix build error caused by unused counters_per_cpu_to_total()

2012-07-19T09:23:44+00:00

cc1: warnings being treated as errors
arch/mips/kernel/perf_event_mipsxx.c:166: error: 'counters_per_cpu_to_total' defined but not used
make[2]: *** [arch/mips/kernel/perf_event_mipsxx.o] Error 1
make[2]: *** Waiting for unfinished jobs....

It was first introduced by 82091564cfd7ab8def42777a9c662dbf655c5d25 [MIPS:
perf: Add support for 64-bit perf counters.] in 3.2.

Signed-off-by: Florian Fainelli 
Cc: linux-mips@linux-mips.org
Cc: david.daney@cavium.com
Patchwork: https://patchwork.linux-mips.org/patch/3357/
Signed-off-by: Ralf Baechle