I found this issue in a locally patched 2.6.32.x, current kernels have
moved the offending code to an __init function which is skipped by
recordmcount.pl, so the bug is not currently being exercised.
However, I think the patch is still a good idea, to avoid future
problems if _mcount were to ever have its address taken in normal
code.
This is what I originally saw:
Although arch/mips/kernel/ftrace.c is built without -pg, and thus
contains no calls to _mcount, it does use the address of _mcount
in ftrace_make_nop(). This was causing relocations to be emitted
for _mcount which recordmcount.pl erronously took to be _mcount
call sites. The result was that the text of ftrace_make_nop()
would be patched with garbage leading to a system crash.
In non-module code, all _mcount call sites will have R_MIPS_26
relocations, so we restrict $mcount_regex to only match on these.
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Wu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
LKML-Reference: <1278712325-12050-1-git-send-email-ddaney@caviumnetworks.com>
Cc: Li Hong <lihong.hi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
make rpm was broken by commit 0915512:
make clean
set -e; cd ..; ln -sf /usr/src/iwlwifi-2.6 kernel-2.6.35rc4wl
/bin/sh /usr/src/iwlwifi-2.6/scripts/setlocalversion --scm-only >
/usr/src/iwlwifi-2.6/.scmversion
cat: .scmversion: input file is output file
make[1]: *** [rpm] Error 1
Reported-and-tested-by: "Zheng, Jiajia" <jiajia.zheng@intel.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
The 'source' builtin is a bash alias to the '.' (dot) builtin. While the
former is supported only by bash, the latter is specified in POSIX and
works fine with all POSIX-compliant shells I am aware of.
The '$_' special parameter is specific to bash. It is partially
supported in dash too but it always evaluates to the current script path
(which causes the script to enter a loop recursively re-executing
itself). This is why I have replaced the two occurences of '$_' with the
explicit parameter.
The 'local' builtin is another example of bash-specific code. Although
it is supported by all POSIX-compliant shells I am aware of, it is not
part of POSIX specification and thus the code should not rely on it
assigning a specific value to the local variable. Moreover, the 'posh'
shell has a limited version of 'local' builtin not supporting direct
variable assignments. Thus, I have broken one of the 'local'
declarations down into a (non-POSIX) 'local' declaration and a plain
(POSIX-compliant) variable assignment.
Signed-off-by: Michał Górny <gentoo@mgorny.alt.pl>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This makes it so "make oldconfig" really prompts for any choice where
options that previously weren't visible just became so. Previously one
would have to remember to go over all choice values and check whether
some that previously couldn't be selected now can be.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Gcc 4.5 is now generating out of line register save and restore
in the function prefix and postfix when we use -Os.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The "select" statement in Kconfig files allows the enabling of options
even if they have unmet direct dependencies (i.e. "depends on" expands
to "no"). Currently, the "depends on" clauses are used in calculating
the visibility but they do not affect the reverse dependencies in any
way.
The patch introduces additional tracking of the "depends on" statements
and prints a warning on selecting an option if its direct dependencies
are not met.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
during a check of the current git head of the linux kernel with the
static code analysis tool cppcheck
(http://sourceforge.net/apps/mediawiki/cppcheck/index.php?title=Main_Page)
the tool discovered a resource leak in linux-2.6/scripts/dtc/fstree.c.
Please refer the attached patch, that fixes the issue.
Fixes https://bugzilla.kernel.org/show_bug.cgi?id=15363
Signed-off-by: Martin Ettl <ettl.martin@gmx.de>
Cc: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This patch makes it possible to use the Coccinelle checker with the C
variable of the build system. To check only newly edited code, the
following command may be used:
'make C={1,2} CHECK="scripts/coccicheck"'
This runs every semantic patch in scripts/coccinelle by default. The
COCCI variable may additionally be used to only apply a single
semantic patch.
Signed-off-by: Nicolas Palix <npalix@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Michal Marek <mmarek@suse.cz>
The initial pass at the generic ABI assumed that wait4() could be
easily expressed using waitid(). Although it's true that wait4()
can be built on waitid(), it's awkward enough that it makes more
sense to continue to include wait4 in the generic syscall ABI.
Since there is already a deprecated wait4 in the ABI, this change
converts that wait4 into old_wait, and puts wait4 in the next
available slot for new supported syscalls, after the platform-specific
syscalls at number 260.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Now that we run scripts/setlocalversion during every build, it makes
sense to move all the localversion logic there. This cleans up the
toplevel Makefile and also makes sure that the script is called only
once in 'make prepare' (previously, it would be called every time due to
a variable expansion in an ifneq statement). No user-visible change is
intended, unless one runs the setlocalversion script directly.
Reported-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Nico Schottelius <nico-linuxsetlocalversion@schottelius.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Alan <alan@clueserver.org> writes:
> program: /home/alan/GitTrees/linux-2.6-mid-ref/scripts/mod/modpost -o
> Module.symvers -S vmlinux.o
>
> Program received signal SIGSEGV, Segmentation fault.
It just hit me.
It's the offset calculation in reloc_location() which overflows:
return (void *)elf->hdr + sechdrs[section].sh_offset +
(r->r_offset - sechdrs[section].sh_addr);
E.g. for the first rodata r entry:
r->r_offset < sechdrs[section].sh_addr
and the expression in the parenthesis produces 0xFFFFFFE0 or something
equally wise.
Reported-by: Alan <alan@clueserver.org>
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
Tested-by: Alan <alan@clueserver.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Not sure if this is correct or not, but with
make menuconfig
HOSTCC scripts/kconfig/conf.o
scripts/kconfig/conf.c: In function 'conf_sym':
scripts/kconfig/conf.c:159:6: warning: variable 'type' set but not used
scripts/kconfig/conf.c: In function 'conf_choice':
scripts/kconfig/conf.c:231:6: warning: variable 'type' set but not used
HOSTLD scripts/kconfig/mconf
I get this using gcc 4.6.0 the below change fixes this form me.
Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Add a Coccinelle file to identify the dereferences of NULL variables
This semantic patch identifies when a variable is known to be NULL
after a test, but it is still dereferenced later.
Signed-off-by: Nicolas Palix <npalix@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Add a Coccinelle file to use the ERR_CAST function
Before the release 2.6.25, one had to use ERR_PTR(PTR_ERR(...)) to
convert the pointer type of an error. Since then, the function
ERR_CAST has been available for that purpose.
Signed-off-by: Nicolas Palix <npalix@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This semantic patch replaces explicit computations
of resource size by a call to resource_size.
Signed-off-by: Nicolas Palix <npalix@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This semantic patch replaces a pair of calls to kmalloc and memset
by a single call to kzalloc.
It only looks for simple cases to avoid false positives.
Signed-off-by: Nicolas Palix <npalix@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Michal Marek <mmarek@suse.cz>
The purpose of this semantic patch is to remove
useless casts, as mentioned in the Linux documentation.
See Chapter 14 in Documentation/CodingStyle for more information.
Signed-off-by: Nicolas Palix <npalix@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Michal Marek <mmarek@suse.cz>
A 'coccicheck' target is added. It can be called with four different
modes. Each one generates a different kind of output, i.e. context,
patch, org, report, according to the corresponding mode to be
activated.
The new target calls the 'coccicheck' front-end in the 'scripts'
directory with the MODE argument. Every SmPL file in the
subdirectories of 'scripts/coccinelle' is then given to the front-end
and applied to the entire source tree.
The four modes behave as follows:
'report' generates a list in the following format:
file:line:column-column: message
'patch' proposes a fix, when possible.
'context' highlights lines of interest and their context in a
diff-like style. Lines of interest are indicated with '-'.
'org' generates a report in the Org mode format of Emacs.
Signed-off-by: Nicolas Palix <npalix@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Useful for when people want to try some version of the perf tools and don't
wants to download the kernel tarball.
Here is a session using this new target:
[root@emilia linux-2.6-tip]# make help | grep -i perf
perf-tar-src-pkg - Build perf-2.6.35-rc1.tar source tarball
perf-targz-src-pkg - Build perf-2.6.35-rc1.tar.gz source tarball
perf-tarbz2-src-pkg - Build perf-2.6.35-rc1.tar.bz2 source tarball
[root@emilia linux-2.6-tip]# make perf-tarbz2-src-pkg
TAR
[root@emilia linux-2.6-tip]# ls -la perf-2.6.35-rc1.tar.bz2
-rw-r--r-- 1 root root 295731 May 31 11:18 perf-2.6.35-rc1.tar.bz2
[root@emilia linux-2.6-tip]# tar xf perf-2.6.35-rc1.tar.bz2
[root@emilia linux-2.6-tip]# cd perf-2.6.35-rc1
[root@emilia perf-2.6.35-rc1]# ls
arch HEAD include lib tools
[root@emilia perf-2.6.35-rc1]# cd tools/perf
[root@emilia perf]# make -j9 2>&1 | tail
CC arch/x86/util/dwarf-regs.o
CC util/probe-finder.o
CC util/newt.o
CC util/scripting-engines/trace-event-perl.o
CC scripts/perl/Perf-Trace-Util/Context.o
CC perf.o
CC builtin-help.o
AR libperf.a
LINK perf
rm .perf.dev.null
[root@emilia perf]# ./perf record -a sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.262 MB perf.data (~11457 samples) ]
[root@emilia perf]# ./perf report | head -12
# Events: 6K cycles
#
# Overhead Command Shared Object Symbol
# ........ ............... .................. ......
#
4.73% perf [kernel.kallsyms] [k] format_decode
4.49% perf libc-2.12.so [.] _IO_file_underflow_internal
4.38% init [kernel.kallsyms] [k] mwait_idle
3.29% perf [kernel.kallsyms] [k] vsnprintf
2.38% init [kernel.kallsyms] [k] sched_clock_local
2.35% init [kernel.kallsyms] [k] apic_timer_interrupt
1.86% sirq-timer/5 [kernel.kallsyms] [k] find_busiest_group
[root@emilia perf]#
Acked-by: Michal Marek <mmarek@suse.cz>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <20100528185357.GA28009@ghostprotocols.net>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
commit 37a8d9f67f18de1e2cbc7387311ce22d4dbff518 tried to combine some
duplicate code and accidentally broke how KBUILD_SYMTYPES worked
This fixes the code to match the original intention by the author who
originally added the code I believe.
The fixes include:
- removing extra whitespaces in the if-statements
- moving the if-statement from around the -r to the -T
- adding a second arg to cmd_gensymtypes to simplify the options passed
to genksyms.
Tested by instrumenting genksyms and seeing what options were passed in
during a make, KBUILD_SYMTYPES make, and when a foo.symref was created.
Everything compiled and looked ok.
Signed-off-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Remove bashisms to make scripts/decodecode work with other shells.
Signed-off-by: Rabin Vincent <rabin@rab.in>
Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Truncate list items to fit in a single line, otherwise those items
which have long prompts will cover some other items.
This follows the behavior of menubox.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Run:
make ARCH=arm menuconfig
And then select "System Type" -> "ARM system type". The kconfig
"choice" menu at this point looks empty.
It's because config ARCH_S3C2410 has a long prompt:
config ARCH_S3C2410
bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
...
menuconfig centers the checklist according to this prompt without
considering the width of the list, and then things get wrong.
Reported-by: Nobin Mathew <nobin.mathew@gmail.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
To follow the way that Official Debian kernel packages are made, put the
generated packages in the right section, the kernel section. This also
avoids polluting the admin section.
Signed-off-by: Rogério Brito <rbrito@ime.usp.br>
Signed-off-by: Michal Marek <mmarek@suse.cz>
The packages generated by the builddeb script conform to the Debian
Policy version 3.8.4. Make this explicit in the generated packages.
Signed-off-by: Rogério Brito <rbrito@ime.usp.br>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This helps when the user sees information of the packages on package
managers like aptitude.
Signed-off-by: Rogério Brito <rbrito@ime.usp.br>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Quite a few Kconfig symbols contain lowercase letters. The current
checkkconfigsymbols.sh code only contains A-Z in the regexp it uses to
find config symbols in source code, so it comes up with the wrong symbol
to look for in Kconfig files and then generates false positives when it
doesn't find that wrong symbol. For example checking drivers/net
generates a false positive for MAC89 because the the actual config
option is MAC89x0.
Fix this by also adding a-z to the regexp.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
scripts/kconfig/nconf is generated by 'make nconfig',
add it into .gitignore.
Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Making gconfig fails on fedora 13 as the linker cannot resolve dlsym.
Adding libdl to the link command fixes this.
make shows this error :-
/usr/bin/ld: scripts/kconfig/kconfig_load.o: undefined reference to symbol 'dlsym@@GLIBC_2.2.5'
/usr/bin/ld: note: 'dlsym@@GLIBC_2.2.5' is defined in DSO /lib64/libdl.so.2 so try adding it to the linker command line
/lib64/libdl.so.2: could not read symbols: Invalid operation
tested on x86_64 fedora 13.
Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This feature has been supported in menuconfig and gconfig, so
here add it to xconfig.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
@ok is a pointer to a bool var, so we should check the value of
*ok. But actually we don't need to check it, so just remove the
if statement.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
In gconfig if you enable "Show all options", you'll see some "(null)"
config options, and clicking those options triggers a warning:
(gconf:9368): Gtk-CRITICAL **: gtk_text_buffer_insert_with_tags: assertion `text != NULL' failed
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Suggested-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Those configs are not new:
$ cat .config
...
CONFIG_NAMESPACES=y
...
CONFIG_BLOCK=y
...
But are tagged as NEW:
$ yes "" | make config > myconf
$ cat myconf | grep '(NEW)'
Namespaces support (NAMESPACES) [Y/?] (NEW) y
...
Enable the block layer (BLOCK) [Y/?] (NEW) y
...
You can also notice this bug when using gconfig/xconfig.
It's because the SYMBOL_DEF_USER bit of an invisible symbol is cleared
when the config file is read:
int conf_read(const char *name)
{
...
for_all_symbols(i, sym) {
if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
/* Reset values of generates values, so they'll appear
* as new, if they should become visible, but that
* doesn't quite work if the Kconfig and the saved
* configuration disagree.
*/
if (sym->visible == no && !conf_unsaved)
sym->flags &= ~SYMBOL_DEF_USER;
...
}
But a menu item which represents an invisible symbol is still
visible, if it's sub-menu is visible, so its SYMBOL_DEF_USER
bit should be set to indicate it's not NEW.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Without this patch, one has to refer to the Kconfig file to find
out the range of an integer/hex symbol.
│ Symbol: NR_CPUS [=4]
│ Type : integer
│ Range : [2 8]
│ Prompt: Maximum number of CPUs
│ Defined at arch/x86/Kconfig:761
│ Depends on: SMP [=y] && !MAXSMP [=n]
│ Location:
│ -> Processor type and features
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Randy suggested to print out the symbol type in gconfig.
Note this change does more than Randy's suggestion, that it also
affects menuconfig and "make config".
│ Symbol: BLOCK [=y]
│ Type : boolean
│ Prompt: Enable the block layer
│ Defined at block/Kconfig:4
│ Depends on: EMBEDDED [=n]
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This patch has been around for a long time in Fedora and Red Hat Enterprise
Linux kernels and it may be useful for others. The nonint_oldconfig target
will fail and print the unset config options while loose_nonint_oldconfig will
simply let the config option unset. They're useful in distro kernel packages
where the config files are built using a combination of smaller config files.
Arjan van de Ven wrote the initial nonint_config and Roland McGrath added the
loose_nonint_oldconfig.
Signed-off-by: Arjan van de Ven <arjan@redhat.com> [defunct email]
Whatevered-by: Kyle McMartin <kyle@redhat.com>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Aristeu Rozanski <aris@redhat.com>
[mmarek: whitespace fixes]
Signed-off-by: Michal Marek <mmarek@suse.cz>
