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2011-07-24modpost: Fix modpost's license checking V3Alessio Igor Bogani1-1/+28
The commit f02e8a6 sorts symbols placing each of them in its own elf section. The sorting and merging into the canonical sections are done by the linker. Unfortunately modpost to generate Module.symvers file parses vmlinux (already linked) and all modules object files (which aren't linked yet). These aren't sanitized by the linker yet. That breaks modpost that can't detect license properly for modules. This patch makes modpost aware of the new exported symbols structure. Thanks to Arnaud Lacombe <lacombar@gmail.com> and Anders Kaseorg <andersk@ksplice.com> for providing useful suggestions about code. This work was supported by a hardware donation from the CE Linux Forum. Reported-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Alessio Igor Bogani <abogani@kernel.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2011-07-14Merge branch 'rc-fixes' of ↵Linus Torvalds1-4/+6
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 * 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: kbuild: Do not write to builddir in modules_install
2011-07-12kbuild: Do not write to builddir in modules_installMichal Marek1-4/+6
Let depmod.sh create a temporary directory in /tmp instead of writing to the build directory as root. The mktemp utility should be available on any recent system (and there is already scripts/gen_initramfs_list.sh relying on it). Reported-by: Christian Kujau <lists@nerdbynature.de> Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-06-16checkpatch: add warning for uses of printk_ratelimitJoe Perches1-0/+5
Warn about uses of printk_ratelimit() because it uses a global state and can hide subsequent useful messages. Signed-off-by: Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@canonical.com> Cc: Richard Weinberger <richard@nod.at> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-10kbuild: Hack for depmod not handling X.Y versionsMichal Marek1-1/+24
depmod from module-init-tools < 3.13 and the busybox depmod check if the kernel release starts with <num>.<num>.<num>. To support these versions, we create a symlink with two numbers prepended. Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-06-10kbuild: Move depmod call to a separate scriptMichal Marek1-0/+25
Do not bloat the Makefile with multiline shell statements. No user-visible change intended. Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-06-09kbuild: silence Nothing to be done for 'all' messagePeter Foley1-0/+1
This patch silences a Makefile.asm-generic message by defining a dummy rule for all. make -f /usr/src/git/scripts/Makefile.asm-generic \ obj=arch/x86/include/generated/asm make[1]: Nothing to be done for `all'. Signed-off-by: Peter Foley <pefoley2@verizon.net> Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-05-28Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds2-2/+12
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (25 commits) perf: Fix SIGIO handling perf top: Don't stop if no kernel symtab is found perf top: Handle kptr_restrict perf top: Remove unused macro perf events: initialize fd array to -1 instead of 0 perf tools: Make sure kptr_restrict warnings fit 80 col terms perf tools: Fix build on older systems perf symbols: Handle /proc/sys/kernel/kptr_restrict perf: Remove duplicate headers ftrace: Add internal recursive checks tracing: Update btrfs's tracepoints to use u64 interface tracing: Add __print_symbolic_u64 to avoid warnings on 32bit machine ftrace: Set ops->flag to enabled even on static function tracing tracing: Have event with function tracer check error return ftrace: Have ftrace_startup() return failure code jump_label: Check entries limit in __jump_label_update ftrace/recordmcount: Avoid STT_FUNC symbols as base on ARM scripts/tags.sh: Add magic for trace-events for etags too scripts/tags.sh: Fix ctags for DEFINE_EVENT() x86/ftrace: Fix compiler warning in ftrace.c ...
2011-05-27Merge branch 'docs-move' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/rdunlap/linux-docs * 'docs-move' of git://git.kernel.org/pub/scm/linux/kernel/git/rdunlap/linux-docs: Create Documentation/security/, move LSM-, credentials-, and keys-related files from Documentation/ to Documentation/security/, add Documentation/security/00-INDEX, and update all occurrences of Documentation/<moved_file> to Documentation/security/<moved_file>.
2011-05-27Merge branch 'tip/perf/urgent' of ↵Ingo Molnar2-2/+12
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/urgent
2011-05-26ftrace/recordmcount: Avoid STT_FUNC symbols as base on ARMRabin Vincent1-0/+8
While find_secsym_ndx often finds the unamed local STT_SECTION, if a section has only one function in it, the ARM toolchain generates the STT_FUNC symbol before the STT_SECTION, and recordmcount finds this instead. This is problematic on ARM because in ARM ELFs, "if a [STT_FUNC] symbol addresses a Thumb instruction, its value is the address of the instruction with bit zero set (in a relocatable object, the section offset with bit zero set)". This leads to incorrect mcount addresses being recorded. Fix this by not using STT_FUNC symbols as the base on ARM. Signed-off-by: Rabin Vincent <rabin@rab.in> Link: http://lkml.kernel.org/r/1305134631-31617-1-git-send-email-rabin@rab.in Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-26scripts/tags.sh: Add magic for trace-events for etags tooSteven Rostedt1-1/+3
Seems that Peter Zijlstra treats us emacs users as second class citizens and the commit: commit 15664125f7cadcb6d725cb2d9b90f9715397848d Author: Peter Zijlstra <peterz@infradead.org> scripts/tags.sh: Add magic for trace-events only updated ctags (for vim) and did not do the work to let us lowly emacs users benefit from such a change. Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-26scripts/tags.sh: Fix ctags for DEFINE_EVENT()Steven Rostedt1-1/+1
The regex to handle DEFINE_EVENT() should not be the same as the TRACE_EVENT() as the first parameter in DEFINE_EVENT is the template name, not the event name. We need the second parameter as that is what the trace_... will use. Tested-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-26Merge branch 'kconfig-for-40' of ↵Linus Torvalds8-78/+81
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 * 'kconfig-for-40' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: xconfig: merge code path to conf_write() kconfig: do not record timestamp in .config gconfig: Hide unused left treeview when start up the interface gconfig: enable rules hint for main treeviews MAINTAINERS: Update KCONFIG entry kconfig-language: add to hints kconfig: Document the new "visible if" syntax kconfig: quiet commands when V=0 kconfig: change update-po-config to reflect new layout of arch/um kconfig: make update-po-config work in KBUILD_OUTPUT kconfig: rearrange clean-files kconfig: change gconf to modify hostprogs-y like nconf and mconf kconfig: change qconf to modify hostprogs-y like nconf and mconf kconfig: only build kxgettext when needed nconfig: Silence unused return values from wattrset kconfig: Do not record timestamp in auto.conf and autoconf.h kconfig: get rid of unused flags kconfig: allow multiple inclusion of the same file kconfig: Avoid buffer underrun in choice input
2011-05-25Merge branch 'misc' of ↵Linus Torvalds3-7/+22
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 * 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: export_report: use warn() to issue WARNING, so they go to stderr export_report: sort SECTION 2 output export_report: do collectcfiles work in perl itself kbuild: make versioncheck work in KBUILD_OUTDIR kbuild: make includecheck work in KBUILD_OUTDIR kbuild: make headerdep work in KBUILD_OUTDIR kbuild: add targets to PHONY kbuild: don't warn about include/linux/version.h not including itself eradicate bashisms in scripts/patch-kernel
2011-05-25Merge branch 'packaging' of ↵Linus Torvalds2-3/+20
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 * 'packaging' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: kbuild: Create a kernel-headers RPM rpm-pkg: Fix when current directory is a symlink Replace '-' in kernel version with '_'
2011-05-25checkpatch: fix defect in printk(KERN_<LEVEL> 80 column exceptionsJoe Perches1-1/+1
Currently, printk lines with a only KERN_PREFIX and a quoted string without a comma or close paren that exceed 80 columns are flagged with a warning. ie: printk(KERN_WARNING "some long string that extends beond 80 cols..." "and is continued on another line\n"); Allow this form instead of emitting a warning. Signed-off-by: Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-25checkpatch: add <foo>_<level> and MODULE_<BAR> to 80 column exceptionsJoe Perches1-3/+3
Many module or file local logging functions use specific prefixes other than pr|dev|netdev. Allow all forms like foo_printk and foo_err to be longer than 80 columns. Also allow MODULE_<BAR> declarations to be longer than 80 columns. Signed-off-by: Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-25checkpatch: add check for line continuations in quoted stringsJoe Perches1-0/+5
Add a warning for unterminated quoted strings with line continuations as these frequently add unwanted whitespace. Signed-off-by: Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-25xconfig: merge code path to conf_write()Arnaud Lacombe1-3/+2
Avoid to have multiple path saving the config. This fixes an error check miss when the window is being closed and the user requested the config to be written. Reported-by: Hiromu Yakura <hiromu1996@gmail.com> Pointed-out-by: Michal Marek <mmarek@suse.cz> Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-05-25Merge branch 'kbuild' of ↵Linus Torvalds13-63/+130
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: kbuild: make KBUILD_NOCMDDEP=1 handle empty built-in.o scripts/kallsyms.c: fix potential segfault scripts/gen_initramfs_list.sh: Convert to a /bin/sh script kbuild: Fix GNU make v3.80 compatibility kbuild: Fix passing -Wno-* options to gcc 4.4+ kbuild: move scripts/basic/docproc.c to scripts/docproc.c kbuild: Fix Makefile.asm-generic for um kbuild: Allow to combine multiple W= levels kbuild: Disable -Wunused-but-set-variable for gcc 4.6.0 Fix handling of backlash character in LINUX_COMPILE_BY name kbuild: asm-generic support kbuild: implement several W= levels kbuild: Fix build with binutils <= 2.19 initramfs: Use KBUILD_BUILD_TIMESTAMP for generated entries kbuild: Allow to override LINUX_COMPILE_BY and LINUX_COMPILE_HOST macros kbuild: Drop unused LINUX_COMPILE_TIME and LINUX_COMPILE_DOMAIN macros kbuild: Use the deterministic mode of ar kbuild: Call gzip with -n kbuild: move KALLSYMS_EXTRA_PASS from Kconfig to Makefile Kconfig: improve KALLSYMS_ALL documentation Fix up trivial conflict in Makefile
2011-05-24kbuild: Create a kernel-headers RPMArun Sharma1-0/+17
To compile binaries which depend on new kernel interfaces, we need a kernel-headers RPM Signed-off-by: Arun Sharma <asharma@fb.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-05-24rpm-pkg: Fix when current directory is a symlinkMichal Marek1-1/+1
The better fix would be to stop using the parent directory (principle of least surprise), but as long as we use it, use it consistently. Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-05-24kconfig: do not record timestamp in .configArnaud Lacombe1-11/+1
Signed-off-by: Arnaud Lacombe <lacombar@gmail.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-05-24export_report: use warn() to issue WARNING, so they go to stderrJim Cromie1-1/+7
Also count CONFIG_MODVERSIONS warnings, and print a NOTE at start of SECTION 2 if any were issued. Section 2 will be empty if the build is lacking this CONFIG_ item, and user may have missed the warnings, as they're off screen. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-05-24export_report: sort SECTION 2 outputJim Cromie1-3/+5
Sort SECTION 2 modules by name. Within those module listings, sort the symbol providers by name, and remove the count, as it is misleading; its the kernel-wide count of uses of that symbol, not the count pertaining to the module being outlined. (this can be seen by grepping the output for a single symbol). The count is still used to sort the symbols. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-05-24export_report: do collectcfiles work in perl itselfJim Cromie1-2/+8
Avoid spawning a shell pipeline doing cat, grep, sed, and do it all inside perl. The <*.c> globbing construct works at least as far back as 5.8.9 Note that this is not just an optimization; the sed command in the pipeline was unterminated, due to lack of escape on the end-of-line (\$) in the regex, resulting in this: $ perl ../linux-2.6/scripts/export_report.pl > /dev/null sed: -e expression #1, char 5: unterminated `s' command sh: .mod.c/: not found Comments on an earlier patch sought an all-perl implementation. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> cc: Michal Marek <mmarek@suse.cz>, cc: linux-kbuild@vger.kernel.org cc: Arnaud Lacombe lacombar@gmail.com cc: Stephen Hemminger shemminger@vyatta.com Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-05-24gconfig: Hide unused left treeview when start up the interfaceEduardo Silva1-2/+6
When the gconfig program starts in full mode view, it shows the left treeview which belongs to the 'split mode view'. The patch fix this visual issue. Signed-off-by: Eduardo Silva <edsiper@gmail.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-05-24gconfig: enable rules hint for main treeviewsEduardo Silva1-2/+2
Due to the large amount of rows in the treeviews, is difficult to match columns with rows, setting the rules hint to 'true' allows the treeview to alternate background colors in the rows making the data more readable. Signed-off-by: Eduardo Silva <edsiper@gmail.com> Tested-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-05-23Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits) b43: fix comment typo reqest -> request Haavard Skinnemoen has left Atmel cris: typo in mach-fs Makefile Kconfig: fix copy/paste-ism for dell-wmi-aio driver doc: timers-howto: fix a typo ("unsgined") perf: Only include annotate.h once in tools/perf/util/ui/browsers/annotate.c md, raid5: Fix spelling error in comment ('Ofcourse' --> 'Of course'). treewide: fix a few typos in comments regulator: change debug statement be consistent with the style of the rest Revert "arm: mach-u300/gpio: Fix mem_region resource size miscalculations" audit: acquire creds selectively to reduce atomic op overhead rtlwifi: don't touch with treewide double semicolon removal treewide: cleanup continuations and remove logging message whitespace ath9k_hw: don't touch with treewide double semicolon removal include/linux/leds-regulator.h: fix syntax in example code tty: fix typo in descripton of tty_termios_encode_baud_rate xtensa: remove obsolete BKL kernel option from defconfig m68k: fix comment typo 'occcured' arch:Kconfig.locks Remove unused config option. treewide: remove extra semicolons ...
2011-05-21Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6Linus Torvalds1-0/+22
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1446 commits) macvlan: fix panic if lowerdev in a bond tg3: Add braces around 5906 workaround. tg3: Fix NETIF_F_LOOPBACK error macvlan: remove one synchronize_rcu() call networking: NET_CLS_ROUTE4 depends on INET irda: Fix error propagation in ircomm_lmp_connect_response() irda: Kill set but unused variable 'bytes' in irlan_check_command_param() irda: Kill set but unused variable 'clen' in ircomm_connect_indication() rxrpc: Fix set but unused variable 'usage' in rxrpc_get_transport() be2net: Kill set but unused variable 'req' in lancer_fw_download() irda: Kill set but unused vars 'saddr' and 'daddr' in irlan_provider_connect_indication() atl1c: atl1c_resume() is only used when CONFIG_PM_SLEEP is defined. rxrpc: Fix set but unused variable 'usage' in rxrpc_get_peer(). rxrpc: Kill set but unused variable 'local' in rxrpc_UDP_error_handler() rxrpc: Kill set but unused variable 'sp' in rxrpc_process_connection() rxrpc: Kill set but unused variable 'sp' in rxrpc_rotate_tx_window() pkt_sched: Kill set but unused variable 'protocol' in tc_classify() isdn: capi: Use pr_debug() instead of ifdefs. tg3: Update version to 3.119 tg3: Apply rx_discards fix to 5719/5720 ... Fix up trivial conflicts in arch/x86/Kconfig and net/mac80211/agg-tx.c as per Davem.
2011-05-20Merge branch 'perf-core-for-linus' of ↵Linus Torvalds4-93/+266
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (107 commits) perf stat: Add more cache-miss percentage printouts perf stat: Add -d -d and -d -d -d options to show more CPU events ftrace/kbuild: Add recordmcount files to force full build ftrace: Add self-tests for multiple function trace users ftrace: Modify ftrace_set_filter/notrace to take ops ftrace: Allow dynamically allocated function tracers ftrace: Implement separate user function filtering ftrace: Free hash with call_rcu_sched() ftrace: Have global_ops store the functions that are to be traced ftrace: Add ops parameter to ftrace_startup/shutdown functions ftrace: Add enabled_functions file ftrace: Use counters to enable functions to trace ftrace: Separate hash allocation and assignment ftrace: Create a global_ops to hold the filter and notrace hashes ftrace: Use hash instead for FTRACE_FL_FILTER ftrace: Replace FTRACE_FL_NOTRACE flag with a hash of ignored functions perf bench, x86: Add alternatives-asm.h wrapper x86, 64-bit: Fix copy_[to/from]_user() checks for the userspace address limit x86, mem: memset_64.S: Optimize memset by enhanced REP MOVSB/STOSB x86, mem: memmove_64.S: Optimize memmove by enhanced REP MOVSB/STOSB ...
2011-05-20Create Documentation/security/,Randy Dunlap1-1/+1
move LSM-, credentials-, and keys-related files from Documentation/ to Documentation/security/, add Documentation/security/00-INDEX, and update all occurrences of Documentation/<moved_file> to Documentation/security/<moved_file>.
2011-05-19ftrace/kbuild: Add recordmcount files to force full buildMichal Marek1-2/+5
Modifications to recordmcount must be performed on all object files to stay consistent with what the kernel code may expect. Add the recordmcount files to the main dependencies to make sure any change to them causes a full recompile. Signed-off-by: Michal Marek <mmarek@suse.cz> Link: http://lkml.kernel.org/r/20110517133646.GP13293@sepie.suse.cz Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-19modpost: Update 64k section support for binutils 2.18.50Anders Kaseorg2-29/+14
Binutils 2.18.50 made a backwards-incompatible change in the way it writes ELF objects with over 65280 sections, to improve conformance with the ELF specification and interoperability with other ELF tools. Specifically, it no longer adds 256 to section indices SHN_LORESERVE and higher to skip over the reserved range SHN_LORESERVE through SHN_HIRESERVE; those values are only considered special in the st_shndx field, and not in other places where section indices are stored. See: http://sourceware.org/bugzilla/show_bug.cgi?id=5900 http://groups.google.com/group/generic-abi/browse_thread/thread/e8bb63714b072e67/6c63738f12cc8a17 Signed-off-by: Anders Kaseorg <andersk@ksplice.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2011-05-19module: Sort exported symbolsAlessio Igor Bogani1-0/+11
This patch places every exported symbol in its own section (i.e. "___ksymtab+printk"). Thus the linker will use its SORT() directive to sort and finally merge all symbol in the right and final section (i.e. "__ksymtab"). The symbol prefixed archs use an underscore as prefix for symbols. To avoid collision we use a different character to create the temporary section names. This work was supported by a hardware donation from the CE Linux Forum. Signed-off-by: Alessio Igor Bogani <abogani@kernel.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (folded in '+' fixup) Tested-by: Dirk Behme <dirk.behme@googlemail.com>
2011-05-19Haavard Skinnemoen has left AtmelJean Delvare1-1/+1
Haavard's e-mail address at Atmel is no longer valid. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Havard Skinnemoen <hskinnemoen@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-05-17Merge branch 'master' of ↵John W. Linville1-0/+22
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem Conflicts: drivers/net/wireless/iwlwifi/iwl-agn-tx.c net/mac80211/sta_info.h
2011-05-16ftrace/s390: mcount offset calculationMartin Schwidefsky2-2/+8
Do the mcount offset adjustment in the recordmcount.pl/recordmcount.[ch] at compile time and not in ftrace_call_adjust at run time. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-16ftrace/x86: mcount offset calculationMartin Schwidefsky2-0/+4
Do the mcount offset adjustment in the recordmcount.pl/recordmcount.[ch] at compile time and not in ftrace_call_adjust at run time. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-16ftrace/recordmcount: mcount address adjustmentMartin Schwidefsky1-2/+7
Introduce mcount_adjust{,_32,_64} to the C implementation of recordmcount analog to $mcount_adjust in the perl script. The adjustment is added to the address of the relocations against the mcount symbol. If this adjustment is done by recordmcount at compile time the ftrace_call_adjust function can be turned into a nop. Cc: John Reiser <jreiser@bitwagon.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-16ftrace/recordmcount: Add helper function get_sym_str_and_relp()Steven Rostedt1-30/+37
The code to get the symbol, string, and relp pointers in the two functions sift_rel_mcount() and nop_mcount() are identical and also non-trivial. Moving this duplicate code into a single helper function makes the code easier to read and more maintainable. Cc: John Reiser <jreiser@bitwagon.com> Link: http://lkml.kernel.org/r/20110421023739.723658553@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-16ftrace/recordmcount: Remove duplicate code to find mcount symbolSteven Rostedt1-24/+27
The code in sift_rel_mcount() and nop_mcount() to get the mcount symbol number is identical. Replace the two locations with a call to a function that does the work. Cc: John Reiser <jreiser@bitwagon.com> Link: http://lkml.kernel.org/r/20110421023739.488093407@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-16kbuild/recordmcount: Add RECORDMCOUNT_WARN to warn about mcount callersSteven Rostedt1-1/+4
When mcount is called in a section that ftrace will not modify it into a nop, we want to warn about this. But not warn about this always. Now if the user builds the kernel with the option RECORDMCOUNT_WARN=1 then the build will warn about mcount callers that are ignored and will just waste execution time. Acked-by: Michal Marek <mmarek@suse.cz> Cc: linux-kbuild@vger.kernel.org Link: http://lkml.kernel.org/r/20110421023738.714956282@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-16ftrace/recordmcount: Add warning logic to warn on mcount not recordedSteven Rostedt2-13/+41
There's some sections that should not have mcount recorded and should not have modifications to the that code. But currently they waste some time by calling mcount anyway (which simply returns). As the real answer should be to either whitelist the section or have gcc ignore it fully. This change adds a option to recordmcount to warn when it finds a section that is ignored by ftrace but still contains mcount callers. This is not on by default as developers may not know if the section should be completely ignored or added to the whitelist. Cc: John Reiser <jreiser@bitwagon.com> Link: http://lkml.kernel.org/r/20110421023738.476989377@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-16ftrace/recordmcount: Make ignored mcount calls into nops at compile timeSteven Rostedt2-6/+116
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>
2011-05-16ftrace/recordmcount: Modify only executable sectionsSteven Rostedt1-0/+1
PROGBITS is not enough to determine if the section should be modified or not. Only process sections that are marked as executable. Cc: John Reiser <jreiser@bitwagon.com> Link: http://lkml.kernel.org/r/20110421023737.991485123@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-16ftrace: Add .kprobe.text section to whitelist for recordmcount.cSteven Rostedt2-0/+2
The .kprobe.text section is safe to modify mcount to nop and tracing. Add it to the whitelist in recordmcount.c and recordmcount.pl. Cc: John Reiser <jreiser@bitwagon.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Link: http://lkml.kernel.org/r/20110421023737.743350547@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-16ftrace/trivial: Clean up record mcount to use Linux switch styleSteven Rostedt1-21/+22
The Linux style for switch statements is: switch (var) { case x: [...] break; } Not: switch (var) { case x: { [...] } break; Cc: John Reiser <jreiser@bitwagon.com> Link: http://lkml.kernel.org/r/20110421023737.523968644@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-05-16ftrace/trivial: Clean up recordmcount.c to use Linux style comparisonsSteven Rostedt2-32/+32
The Linux ftrace subsystem style for comparing is: var == 1 var > 0 and not: 1 == var 0 < var It is considered that Linux developers are smart enough not to do the if (var = 1) mistake. Cc: John Reiser <jreiser@bitwagon.com> Link: http://lkml.kernel.org/r/20110421023737.290712238@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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