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authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-27 15:14:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-27 15:14:26 -0700
commitcea8f46c36c3f82860b038aa23a46e16757666ba (patch)
treee09dc37d2b6880d86dac09afbc0c686139d86df0 /arch/arm/Kconfig.debug
parentc1e7179a38919f02dd950801529176b72f5e5a8a (diff)
parent91b006def384d8f07f9f324ab211fefe2b085c90 (diff)
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op-kernel-dev-cea8f46c36c3f82860b038aa23a46e16757666ba.tar.gz
Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM updates from Russell King: "First ARM push of this merge window, post me coming back from holiday. This is what has been in linux-next for the last few weeks. Not much to say which isn't described by the commit summaries." * 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (32 commits) ARM: 7463/1: topology: Update cpu_power according to DT information ARM: 7462/1: topology: factorize the update of sibling masks ARM: 7461/1: topology: Add arch_scale_freq_power function ARM: 7456/1: ptrace: provide separate functions for tracing syscall {entry,exit} ARM: 7455/1: audit: move syscall auditing until after ptrace SIGTRAP handling ARM: 7454/1: entry: don't bother with syscall tracing on ret_from_fork path ARM: 7453/1: audit: only allow syscall auditing for pure EABI userspace ARM: 7452/1: delay: allow timer-based delay implementation to be selected ARM: 7451/1: arch timer: implement read_current_timer and get_cycles ARM: 7450/1: dcache: select DCACHE_WORD_ACCESS for little-endian ARMv6+ CPUs ARM: 7449/1: use generic strnlen_user and strncpy_from_user functions ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration ARM: 7447/1: rwlocks: remove unused branch labels from trylock routines ARM: 7446/1: spinlock: use ticket algorithm for ARMv6+ locking implementation ARM: 7445/1: mm: update CONTEXTIDR register to contain PID of current process ARM: 7444/1: kernel: add arch-timer C3STOP feature ARM: 7460/1: remove asm/locks.h ARM: 7439/1: head.S: simplify initial page table mapping ARM: 7437/1: zImage: Allow DTB command line concatenation with ATAG_CMDLINE ARM: 7436/1: Do not map the vectors page as write-through on UP systems ...
Diffstat (limited to 'arch/arm/Kconfig.debug')
-rw-r--r--arch/arm/Kconfig.debug9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index a03b5a7..f15f82b 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -395,4 +395,13 @@ config ARM_KPROBES_TEST
help
Perform tests of kprobes API and instruction set simulation.
+config PID_IN_CONTEXTIDR
+ bool "Write the current PID to the CONTEXTIDR register"
+ depends on CPU_COPY_V6
+ help
+ Enabling this option causes the kernel to write the current PID to
+ the PROCID field of the CONTEXTIDR register, at the expense of some
+ additional instructions during context switch. Say Y here only if you
+ are planning to use hardware trace tools with this kernel.
+
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