26 Mar, 2006
4 commits
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This patch puts the infrastructure in place to allow for a reordering of
functions based inside the vmlinux. The general idea is that it is possible
to put all "common" functions into the first 2Mb of the code, so that they
are covered by one TLB entry. This as opposed to the current situation where
a typical vmlinux covers about 3.5Mb (on x86-64) and thus 2 TLB entries.This is done by enabling the -ffunction-sections flag in gcc, which puts
each function in its own ELF section, so that the linker can then order them
in a way defined by the linker script.As per previous discussions, Linus said he wanted a "static" list for this,
eg a list provided by the kernel tarbal, so that most people have the same
ordering at least. A script is provided to create this list based on
readprofile(1) output. The included list is provisional, and entirely biased
on my own testbox and me running a few kernel compiles and some other
things.I think that to get to a better list we need to invite people to submit
their own profiles, and somehow add those all up and base the final list on
that. I'm willing to do that effort if this is ends up being the prefered
approach. Such an effort probably needs to be repeated like once a year or
so to adopt to the changing nature of the kernel.Made it a CONFIG with default n because it increases link times
dramatically.Signed-off-by: Andi Kleen
Signed-off-by: Linus Torvalds -
* master.kernel.org:/pub/scm/linux/kernel/git/sam/kbuild: (46 commits)
kbuild: remove obsoleted scripts/reference_* files
kbuild: fix make help & make *pkg
kconfig: fix time ordering of writes to .kconfig.d and include/linux/autoconf.h
Kconfig: remove the CONFIG_CC_ALIGN_* options
kbuild: add -fverbose-asm to i386 Makefile
kbuild: clean-up genksyms
kbuild: Lindent genksyms.c
kbuild: fix genksyms build error
kbuild: in makefile.txt note that Makefile is preferred name for kbuild files
kbuild: replace PHONY with FORCE
kbuild: Fix bug in crc symbol generating of kernel and modules
kbuild: change kbuild to not rely on incorrect GNU make behavior
kbuild: when warning symbols exported twice now tell user this is the problem
kbuild: fix make dir/file.xx when asm symlink is missing
kbuild: in the section mismatch check try harder to find symbols
kbuild: fix section mismatch check for unwind on IA64
kbuild: kill false positives from section mismatch warnings for powerpc
kbuild: kill trailing whitespace in modpost & friends
kbuild: small update of allnoconfig description
kbuild: make namespace.pl CROSS_COMPILE happy
...Trivial conflict in arch/ppc/boot/Makefile manually fixed up
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* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (21 commits)
BUG_ON() Conversion in drivers/video/
BUG_ON() Conversion in drivers/parisc/
BUG_ON() Conversion in drivers/block/
BUG_ON() Conversion in sound/sparc/cs4231.c
BUG_ON() Conversion in drivers/s390/block/dasd.c
BUG_ON() Conversion in lib/swiotlb.c
BUG_ON() Conversion in kernel/cpu.c
BUG_ON() Conversion in ipc/msg.c
BUG_ON() Conversion in block/elevator.c
BUG_ON() Conversion in fs/coda/
BUG_ON() Conversion in fs/binfmt_elf_fdpic.c
BUG_ON() Conversion in input/serio/hil_mlc.c
BUG_ON() Conversion in md/dm-hw-handler.c
BUG_ON() Conversion in md/bitmap.c
The comment describing how MS_ASYNC works in msync.c is confusing
rcu: undeclared variable used in documentation
fix typos "wich" -> "which"
typo patch for fs/ufs/super.c
Fix simple typos
tabify drivers/char/Makefile
... -
This fixes coverity bugs #398 and #397
Signed-off-by: Jesper Juhl
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
25 Mar, 2006
1 commit
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Signed-off-by: Uwe Zeisberger
Signed-off-by: Adrian Bunk
24 Mar, 2006
3 commits
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Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
21 Mar, 2006
2 commits
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The checks performed by scripts/reference_* has been moved to modpost.
Remove the files and their reference in top-level Makefile.Signed-off-by: Sam Ravnborg
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This patch adds the ability to mark symbols that will be changed in the
future, so that kernel modules that don't include MODULE_LICENSE("GPL")
and use the symbols, will be flagged and printed out to the system log.Signed-off-by: Greg Kroah-Hartman
17 Mar, 2006
1 commit
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Jiri Benc reported that modpost would stop with SIGABRT if
used with long filepaths.
The error looked like:
> Building modules, stage 2.
> MODPOST
> *** glibc detected *** scripts/mod/modpost: realloc(): invalid next size:
+0x0809f588 ***
> [...]Fix this by allocating at least the required memory + SZ bytes each time.
Before we sometimes ended up allocating too little memory resuting in the
glibc detected bug above. Based on patch originally submitted by: Jiri
BencSigned-off-by: Sam Ravnborg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Mar, 2006
5 commits
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Since .kconfig.d is used as a make dependency of include/linux/autoconf.h, it
should be written earlier than the header file, to avoid a subsequent rebuild
to consider the header outdated.Signed-Off-By: Jan Beulich
Signed-off-by: Sam Ravnborg -
Add -fverbose-asm to i386 Makefile rule for building .s files. This makes
the assembler output much more readable for humans.Suggested by Der Herr Hofrat
Signed-off-by: Chuck Ebbert
Signed-off-by: Andrew Morton
Signed-off-by: Sam Ravnborg -
o remove all inlines
o declare everything static which is only used by genksyms.c
o delete unused functions
o delete unused variables
o delete unused stuff in genksyms.h
o properly ident genksyms.hSigned-off-by: Sam Ravnborg
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No fix-ups applied yet. Just the raw Lindent output.
Signed-off-by: Sam Ravnborg
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genksyms needs to know when a symbol must have a "_" prefex as is
true for a few architectures.
Pass $(ARCH) as commandline argument and hardcode what architectures that
needs this info.
Previous attemt to take it from elfconfig.h was br0ken since elfconfig.h
is a generated file.Signed-off-by: Sam Ravnborg
09 Mar, 2006
2 commits
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.PHONY: does not take patterns so use FORCE to achive same effect.
Thanks to "Paul D. Smith" for noticing this.Signed-off-by: Sam Ravnborg
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The scripts/genksyms/genksyms.c uses hardcoded "__crc_" prefix for
crc symbols in kernel and modules. The prefix should be replaced by
"MODULE_SYMBOL_PREFIX##__crc_" otherwise there will be warnings when
MODULE_SYMBOL_PREFIX is not NULL.I am sorry my last patch for this issue is actually wrong. I revert
it in this patch.Signed-off-by: Luke Yang
Signed-off-by: Sam Ravnborg
07 Mar, 2006
1 commit
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Fix matching of devmodel in modaliases. It breaks automatic loading of any
dasd module.Cc: Heiko Carstens
Cc: Martin Schwidefsky
Acked-by: Cornelia Huck
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Mar, 2006
1 commit
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The kbuild system takes advantage of an incorrect behavior in GNU make.
Once this behavior is fixed, all files in the kernel rebuild every time,
even if nothing has changed. This patch ensures kbuild works with both
the incorrect and correct behaviors of GNU make.For more details on the incorrect behavior, see:
http://lists.gnu.org/archive/html/bug-make/2006-03/msg00003.html
Changes in this patch:
- Keep all targets that are to be marked .PHONY in a variable, PHONY.
- Add .PHONY: $(PHONY) to mark them properly.
- Remove any $(PHONY) files from the $? list when determining whether
targets are up-to-date or not.Signed-off-by: Paul Smith
Signed-off-by: Sam Ravnborg
05 Mar, 2006
4 commits
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Warning now looks like this:
WARNING: vmlinux: 'strcpy' exported twice. Previous export was in vmlinuxWhich gives much better hint how to fix it.
Signed-off-by: Sam Ravnborg
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When searching for symbols the only check performed was if
offset equals st_value. Adding an additional check to see if st_name
points t a valid name made us sort out a few more false positives and
let us report more correct names in warnings.Signed-off-by: Sam Ravnborg
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Parameters to strstr() was reversed.
Signed-off-by: Sam Ravnborg
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Building an allmodconfig kernel for ppc64 revealed a number of false
positives - originally reported by Andrew Morton.
This patch removes most if not all false positives for ppc64:Section .opd
The .opd section contains function descriptors at least for ppc64.
So ignore it for .init.text (was ignored for .exit.text).
See description of function descriptors here:
http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi-1.7.htmlSection .toc1
ppc64 places some static variables in .toc1 - ignore the.Section __bug_tabe
BUG() and friends uses __bug_table. Ignore warnings from that section.Module parameters are placed in .data.rel for ppc64, for adjust pattern to
match on section named .data*Tested with gcc: 3.4.0 and binutils 2.15.90.0.3
Signed-off-by: Sam Ravnborg
03 Mar, 2006
1 commit
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Signed-off-by: Sam Ravnborg
27 Feb, 2006
4 commits
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'allnoconfig' is described by 'make help' as a "minimal config", that's not
strictly correct. To be pedantic, a minimal config would be one where
EMBEDDED was set to Y and most things therein disabled etc. Simply
answering 'no' to all options does not give a minimal config.
A better description of allnoconfig is that it answers all options with 'no'.This patch updates the description.
Signed-off-by: Jesper Juhl
Signed-off-by: Sam Ravnborg -
Using the fixed path to /usr/bin/{nm,objdump} does not allow
CROSS_COMPILE environments to use namespace.pl. This patch causes
namespace.pl to use $NM and $OBJDUMP if defined or fall back to the nm
and objdump found in the path.Signed-off-by: Aaron Brooks
Signed-off-by: Sam Ravnborg -
In several cases the section mismatch check triggered false warnings.
Following patch introduce a whitelist to 'false positives' are not warned of.
Two types of patterns are recognised:
1) Typical case when a module parameter is _initdata
2) When a function pointer is assigned to a driver structureIn both patterns we rely on the actual name of the variable assigned
Signed-off-by: Sam Ravnborg
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It seems popular to protect your work with copyright, so I decided to do
so for modpost which I patch a great deal atm.Signed-off-by: Sam Ravnborg
23 Feb, 2006
2 commits
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Andrew Morton reported a number of false positives for ia64 - like these:
WARNING: drivers/acpi/button.o - Section mismatch: reference to .init.text: from .IA_64.unwind.init.text after '' (at offset 0x0)
WARNING: drivers/acpi/button.o - Section mismatch: reference to .exit.text: from .IA_64.unwind.exit.text after '' (at offset 0x0)
WARNING: drivers/acpi/processor.o - Section mismatch: reference to .init.text: from .IA_64.unwind after '' (at offset 0x1e8)They are all false positives - or at least the .c code looks OK.
It is not known why sometimes a section name is appended and sometimes not.Fix is to accept references from all sections that includes "unwind." in the name.
Signed-off-by: Sam Ravnborg
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The kernel now requires that CC be 3.1.0 or higher. But we shouldn't place
that requirement upon HOSTCC unless we really need to. Fixes my ia64 problem.Signed-off-by: Andrew Morton
Signed-off-by: Sam Ravnborg
19 Feb, 2006
9 commits
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Try to look up the symbol that is referenced. Include the symbol
name in the warning message.Signed-off-by: Sam Ravnborg
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Do not try to look up section name until we know it is not a special
section. Otherwise we will address outside legal space and segfault.Signed-off-by: Sam Ravnborg
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A combination of calling modpost with option -a and MODVERDIR undefined
caused segmentation fault. So provide a default value and accept the
error messages it generates instead.Signed-off-by: Sam Ravnborg
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Noted by Olaf Hering
Signed-off-by: Sam Ravnborg
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checkconfig.pl is no longer needed now that autoconf.h is automatically
included. Remove it and all references to it.Signed-off-by: Brian Gerst
Signed-off-by: Sam Ravnborg -
With the current way of generating the Makefile in the output directory
for builds outside of the source tree, specifying real targets (rather
than phony ones) doesn't work in an already (partially) built tree, as
the stub Makefile doesn't have any dependency information available.
Thus, all targets where files may actually exist must be listed
explicitly and, due to what I'd call a make misbehavior, directory
targets must then also be special cased.Signed-Off-By: Jan Beulich
Signed-off-by: Sam Ravnborg -
While the recent change to also escape # symbols when storing C-file
compilation command lines was helpful, it should be in effect for all
command lines, as much as the dollar escaping should be in effect for
C-source compilation commands. Additionally, for better readability and
maintenance, consolidating all the escaping (single quotes, dollars,
and now sharps) was also desirable.Signed-Off-By: Jan Beulich
Signed-off-by: Sam Ravnborg -
Move $(CC) support functions to Kbuild.include so they are available
in the kbuild files.
In addition the following was done:
o as-option documented in Documentation/kbuild/makefiles.txt
o Moved documentation to new section to match
new scope of functions
o added cc-ifversion used to conditionally select a text string
dependent on actual $(CC) version
o documented cc-ifversion
o change so Kbuild.include is read before the kbuild fileSigned-off-by: Sam Ravnborg
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Section mismatch is identified as references to .init*
sections from non .init sections. And likewise references
to .exit.* sections outside .exit sections..init.* sections are discarded after a module is initialized
and references to .init.* sections are oops candidates.
.exit.* sections are discarded when a module is built-in and
thus references to .exit are also oops candidates.The checks were possible to do using 'make buildcheck' which
called the two perl scripts: reference_discarded.pl and
reference_init.pl. This patch just moves the same functionality
inside modpost and the scripts are then obsoleted.
They will though be kept for a while so users can do double
checks - but note that some .o files are skipped by the perl scripts
so result is not 1:1.
All credit for the concept goes to Keith Owens who implemented
the original perl scrips - this patch just moves it to modpost.Compared to the perl script the implmentation in modpost will be run
for each kernel build - thus catching the error much sooner, but
the downside is that the individual .o file are not always identified.Signed-off-by: Sam Ravnborg
