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e6d60b368b
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Heiko Carstens e6d60b368b s390/ftrace: hotpatch support for function tracing 
Make use of gcc's hotpatch support to generate better code for ftrace
function tracing.
The generated code now contains only a six byte nop in each function
prologue instead of a 24 byte code block which will be runtime patched to
support function tracing.
With the new code generation the runtime overhead for supporting function
tracing is close to zero, while the original code did show a significant
performance impact.

Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-01-29 09:19:25 +01:00
..
alpha arch: Cleanup read_barrier_depends() and comments 2014-12-11 21:15:05 -05:00
arc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
arm Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2014-12-17 10:16:27 -08:00
arm64 arm64 fixes: 2014-12-16 14:12:33 -08:00
avr32 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
blackfin TTY/Serial driver patches for 3.19-rc1 2014-12-14 15:23:32 -08:00
c6x net, lib: kill arch_fast_hash library bits 2014-12-10 15:17:46 -05:00
cris Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
frv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
hexagon net, lib: kill arch_fast_hash library bits 2014-12-10 15:17:46 -05:00
ia64 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-12-16 15:53:03 -08:00
m32r Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
m68k Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
metag arch: Add lightweight memory barriers dma_rmb() and dma_wmb() 2014-12-11 21:15:06 -05:00
microblaze Microblaze patches for 3.19-rc1 2014-12-17 09:54:05 -08:00
mips Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
mn10300 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
nios2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
openrisc net, lib: kill arch_fast_hash library bits 2014-12-10 15:17:46 -05:00
parisc parisc: percpu: update comments referring to __get_cpu_var 2014-12-13 12:42:53 -08:00
powerpc Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
s390 s390/ftrace: hotpatch support for function tracing 2015-01-29 09:19:25 +01:00
score net, lib: kill arch_fast_hash library bits 2014-12-10 15:17:46 -05:00
sh gcov: enable GCOV_PROFILE_ALL from ARCH Kconfigs 2014-12-13 12:42:51 -08:00
sparc Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
tile Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2014-12-16 13:54:16 -08:00
um TTY/Serial driver patches for 3.19-rc1 2014-12-14 15:23:32 -08:00
unicore32 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
x86 x86: mm: fix VM_FAULT_RETRY handling 2014-12-17 11:52:37 -08:00
xtensa Xtensa fixes for 3.19: 2014-12-16 14:08:53 -08:00
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