Steven Rostedt
ffd618fa39
ftrace/recordmcount: Make ignored mcount calls into nops at compile time ...
There are sections that are ignored by ftrace for the function tracing because
the text is in a section that can be removed without notice. The mcount calls
in these sections are ignored and ftrace never sees them. The downside of this
is that the functions in these sections still call mcount. Although the mcount
function is defined in assembly simply as a return, this added overhead is
unnecessary.
The solution is to convert these callers into nops at compile time.
A better solution is to add 'notrace' to the section markers, but as new sections
come up all the time, it would be nice that they are delt with when they
are created.
Later patches will deal with finding these sections and doing the proper solution.
Thanks to H. Peter Anvin for giving me the right nops to use for x86.
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: John Reiser <jreiser@bitwagon.com>
Link: http://lkml.kernel.org/r/20110421023738.237101176@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-16 14:43:32 -04:00
kbuild: Fix computing srcversion for modules
2011-03-13 15:59:58 -07:00
scripts/coccinelle: update for compatability with Coccinelle 0.2.4
2010-12-03 12:27:01 +01:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
genksyms: Regenerate lexer and parser
2011-03-17 15:13:56 +01:00
kconfig: Avoid buffer underrun in choice input
2011-04-24 08:24:31 -07:00
Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6
2011-03-21 15:55:26 -07:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
SELinux: Auto-generate security_is_socket_class
2011-03-03 15:19:43 -05:00
gitignore: add scripts/recordmcount
2010-11-25 15:49:50 +01:00
bloat-o-meter: include read-only data section in report
2011-03-22 17:44:17 -07:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
checksyscalls: Fix stand-alone usage
2010-12-20 15:40:33 +01:00
Coccinelle: Add contextual message
2010-10-28 00:32:23 +02:00
kbuild: add numeric --set-val option to scripts/config
2010-12-15 15:44:31 +01:00
scripts/extract-ikconfig: add xz compression support
2011-02-10 15:23:03 +01:00
jump label: Fix GCC feature check when distcc is used
2010-09-24 09:12:25 +02:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
get_maintainer.pl: allow "K:" pattern tests to match non-patch text
2011-03-22 17:44:13 -07:00
scripts: fix gfp-translate for recent changes to gfp.h
2010-11-25 06:50:49 +09:00
kbuild: introduce HDR_ARCH_LIST for headers_install_all
2010-12-14 22:16:19 +01:00
headers_check: Fix warning text
2010-12-14 17:05:08 +01:00
headers_install: check exit status of unifdef
2010-12-14 15:06:04 +01:00
scripts/kallsyms: Enable error messages while hush up unnecessary warnings
2010-09-29 16:18:27 +02:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
KBuild: silence "'scripts/unifdef' is up to date."
2011-03-17 12:29:20 +01:00
kbuild: Add extra gcc checks
2011-03-09 15:35:35 +01:00
decompressors: add XZ decompressor module
2011-01-13 08:03:24 -08:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
mkuboot.sh: Fail if mkimage is missing
2011-01-07 14:31:01 +01:00
Revert "namespace: add source file location exceptions"
2010-10-28 00:59:56 +02:00
ftrace/recordmcount: Make ignored mcount calls into nops at compile time
2011-05-16 14:43:32 -04:00
ftrace/recordmcount: Make ignored mcount calls into nops at compile time
2011-05-16 14:43:32 -04:00
ftrace: Add .kprobe.text section to whitelist for recordmcount.c
2011-05-16 14:42:15 -04:00
setlocalversion: update mercurial tag parsing
2011-01-15 00:40:44 +01:00
Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6
2011-03-20 18:13:09 -07:00
unifdef: update to upstream version 2.5
2011-01-22 15:50:59 +01:00
decompressors: add XZ decompressor module
2011-01-13 08:03:24 -08:00
ffd618fa39