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2009-07-22Linux 2.6.31-rc4Linus Torvalds
2009-07-16Add '-fno-delete-null-pointer-checks' to gcc CFLAGSEugene Teo
Turning on this flag could prevent the compiler from optimising away some "useless" checks for null pointers. Such bugs can sometimes become exploitable at compile time because of the -O2 optimisation. See http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Optimize-Options.html An example that clearly shows this 'problem' is commit 6bf67672. static void __devexit agnx_pci_remove(struct pci_dev *pdev) { struct ieee80211_hw *dev = pci_get_drvdata(pdev); - struct agnx_priv *priv = dev->priv; + struct agnx_priv *priv; AGNX_TRACE; if (!dev) return; + priv = dev->priv; By reverting this patch, and compile it with and without -fno-delete-null-pointer-checks flag, we can see that the check for dev is compiled away. call printk # - testq %r12, %r12 # dev - je .L94 #, movq %r12, %rdi # dev, Clearly the 'fix' is to stop using dev before it is tested, but building with -fno-delete-null-pointer-checks flag at least makes it harder to abuse. Signed-off-by: Eugene Teo <eugeneteo@kernel.sg> Acked-by: Eric Paris <eparis@redhat.com> Acked-by: Wang Cong <amwang@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-13Linux 2.6.31-rc3Linus Torvalds
2009-07-12Don't use '-fwrapv' compiler option: it's buggy in gcc-4.1.xLinus Torvalds
This causes kernel images that don't run init to completion with certain broken gcc versions. This fixes kernel bugzilla entry: http://bugzilla.kernel.org/show_bug.cgi?id=13012 I suspect the gcc problem is this: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28230 Fix the problem by using the -fno-strict-overflow flag instead, which not only does not exist in the known-to-be-broken versions of gcc (it was introduced later than fwrapv), but seems to be much less disturbing to gcc too: the difference in the generated code by -fno-strict-overflow are smaller (compared to using neither flag) than when using -fwrapv. Reported-by: Barry K. Nathan <barryn@pobox.com> Pushed-by: Frans Pop <elendil@planet.nl> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-04Linux 2.6.31-rc2Linus Torvalds
2009-06-27kbuild: finally remove the obsolete variable $TOPDIRAmerigo Wang
TOPDIR is obsolete, it can be finally removed now. Signed-off-by: WANG Cong <amwang@redhat.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2009-06-27Kbuild: Disable the -Wformat-security gcc flagFloris Kraak
Some distributions have enabled the gcc flag -Wformat-security by default. This results in a number of warnings about format arguments to functions, sometimes in cases where fixing the warning is not likely to actually fix a bug. Instead of hand patching a dozens of places (possibly more) that produce warnings that get ignored anyway we just turn off the flag in the Makefile. Signed-off-by: Floris Kraak <randakar@gmail.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2009-06-24Linux 2.6.31-rc1Linus Torvalds
2009-06-18gcov: add gcov profiling infrastructurePeter Oberparleiter
Enable the use of GCC's coverage testing tool gcov [1] with the Linux kernel. gcov may be useful for: * debugging (has this code been reached at all?) * test improvement (how do I change my test to cover these lines?) * minimizing kernel configurations (do I need this option if the associated code is never run?) The profiling patch incorporates the following changes: * change kbuild to include profiling flags * provide functions needed by profiling code * present profiling data as files in debugfs Note that on some architectures, enabling gcc's profiling option "-fprofile-arcs" for the entire kernel may trigger compile/link/ run-time problems, some of which are caused by toolchain bugs and others which require adjustment of architecture code. For this reason profiling the entire kernel is initially restricted to those architectures for which it is known to work without changes. This restriction can be lifted once an architecture has been tested and found compatible with gcc's profiling. Profiling of single files or directories is still available on all platforms (see config help text). [1] http://gcc.gnu.org/onlinedocs/gcc/Gcov.html Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Huang Ying <ying.huang@intel.com> Cc: Li Wei <W.Li@Sun.COM> Cc: Michael Ellerman <michaele@au1.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Heiko Carstens <heicars2@linux.vnet.ibm.com> Cc: Martin Schwidefsky <mschwid2@linux.vnet.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: WANG Cong <xiyou.wangcong@gmail.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-14Merge branch 'master' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next: (53 commits) .gitignore: ignore *.lzma files kbuild: add generic --set-str option to scripts/config kbuild: simplify argument loop in scripts/config kbuild: handle non-existing options in scripts/config kallsyms: generalize text region handling kallsyms: support kernel symbols in Blackfin on-chip memory documentation: make version fix kbuild: fix a compile warning gitignore: Add GNU GLOBAL files to top .gitignore kbuild: fix delay in setlocalversion on readonly source README: fix misleading pointer to the defconf directory vmlinux.lds.h update kernel-doc: cleanup perl script Improve vmlinux.lds.h support for arch specific linker scripts kbuild: fix headers_exports with boolean expression kbuild/headers_check: refine extern check kbuild: fix "Argument list too long" error for "make headers_check", ignore *.patch files Remove bashisms from scripts menu: fix embedded menu presentation ...
2009-06-09Linux 2.6.30Linus Torvalds
2009-06-09kbuild: remove extra ifdef/endif of top MakefileCheng Renquan
The GNU make's origin function know undefined variable well, so the outer ifdef/endif conditional checking is unneeded. From `info make` documentation, origin will return `undefined' if VARIABLE was never defined. `command line' if VARIABLE was defined on the command line. ... Therefore, $(origin V) will get a value anyway, killing ifdef/endif is viable and safe. Furthermore, I've checked the minimal requirements from Documentation/Changes is GNU make 3.79.1, and that version of GNU make has support of origin function well already, so now it's safe to kill the outer conditional checking, without upgrading the minimal requirements. Signed-off-by: Cheng Renquan <crq@kernel.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2009-06-04kbuild: fix detection of CONFIG_FRAME_WARN=0Mike Frysinger
The checking of CONFIG_FRAME_WARN in the top level Makefile forgot to actually derefence the variable thus leading to an always true check. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Andi Kleen <ak@suse.de> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-02Linux 2.6.30-rc8Linus Torvalds
2009-05-23Linux 2.6.30-rc7Linus Torvalds
2009-05-15Linux 2.6.30-rc6Linus Torvalds
2009-05-08Linux 2.6.30-rc5Linus Torvalds
2009-05-01kbuild: "make prepare" should be "make modules_prepare"Robert P. J. Day
Correct the Makefile help text to read "make modules_prepare". Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2009-05-01kbuild: clean Module.markers and modules.order for out-of-tree modulesFrédéric Brière
Signed-off-by: Frédéric Brière <fbriere@fbriere.net> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2009-04-29Linux 2.6.30-rc4Linus Torvalds
2009-04-21Linux 2.6.30-rc3Linus Torvalds
2009-04-19kbuild: support include/generatedSam Ravnborg
We need a location for generated files. Today they are spread over several places and bringing them together to a common place makes it obvious hat is generated and what isreal files. Al Viro originally suggested: include/gen Linus suggested to spell it out. This patch implement support for include/generated All files in include/generated are ignored by git. include/generated is removed during "make mrproper". With this we are ready to implement support for include/generated in the various architctures and in the base kernel. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-14Linux 2.6.30-rc2Linus Torvalds
2009-04-14Merge branch 'master' of ↵Paul Mundt
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
2009-04-11kbuild: make it possible for the linker to discard local symbols from vmlinuxDavid Howells
Make it possible for the linker to discard local symbols from vmlinux as they cause vmlinux to balloon when CONFIG_KALLSYMS=y and they cause dump_stack() and get_wchan() to produce useless information under some circumstances. With this we add a config option (CONFIG_STRIP_ASM_SYMS) that will cause the build to supply -X to the linker to tell it to strip temporary local symbols. This doesn't seem to cause gdb any problems. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2009-04-11kbuild: fix a few typos in top-level MakefileKirill Smelkov
Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru> Acked-by: Dmitry Gryazin <gdu@mns.spb.ru> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2009-04-11sh: Plug in support for ARCH=sh64 using sh SRCARCH.Paul Mundt
This adds in support for building with ARCH=sh64 using the sh SRCARCH. This tidies up the randconfig generation somewhat to make sure that we don't end up with impossible configurations, and without having to rely on things like KCONFIG_ALLCONFIG to detect the proper CPU support subset. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-04-07Linux 2.6.30-rc1Linus Torvalds
2009-03-27Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2Ingo Molnar
Conflicts: arch/parisc/kernel/irq.c arch/x86/include/asm/fixmap_64.h arch/x86/include/asm/setup.h kernel/irq/handle.c Semantic merge: arch/x86/include/asm/fixmap.h Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-23Linux 2.6.29Linus Torvalds
2009-03-23Build with -fno-dwarf2-cfi-asmKyle McMartin
With a sufficiently new compiler and binutils, code which wasn't previously generating .eh_frame sections has begun to. Certain architectures (powerpc, in this case) may generate unexpected relocation formats in response to this, preventing modules from loading. While the new relocation types should probably be handled, revert to the previous behaviour with regards to generation of .eh_frame sections. (This was reported against Fedora, which appears to be the only distro doing any building against gcc-4.4 at present: RH bz#486545.) Signed-off-by: Kyle McMartin <kyle@redhat.com> Acked-by: Roland McGrath <roland@redhat.com> Cc: Alexandre Oliva <aoliva@redhat.com> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-03-19Move cc-option to below arch-specific setupLinus Torvalds
Sam Ravnborg says: "We have several architectures that plays strange games with $(CC) and $(CROSS_COMPILE). So we need to postpone any use of $(call cc-option..) until we have included the arch specific Makefile so we try with the correct $(CC) version." Requested-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-03-19Add '-fwrapv' to gcc CFLAGSLinus Torvalds
This makes sure that gcc doesn't try to optimize away wrapping arithmetic, which the kernel occasionally uses for overflow testing, ie things like if (ptr + offset < ptr) which technically is undefined for non-unsigned types. See http://bugzilla.kernel.org/show_bug.cgi?id=12597 for details. Not all versions of gcc support it, so we need to make it conditional (it looks like it was introduced in gcc-3.4). Reminded-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-03-12Linus 2.6.29-rc8Linus Torvalds
2009-03-07kbuild: remove unused -r option for module-init-tool depmodGilles Espinasse
Following a thread on busybox mailing list depmod -r option is ignored by module-init-tools depmod -r option break busybox depmod. So the best solution look to remove -r from kernel Makefile Signed-off-by: Gilles Espinasse <g.esp@free.fr> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2009-03-07kbuild: fix 'make rpm' when CONFIG_LOCALVERSION_AUTO=y and using SCM treeJosh Hunt
Running 'make rpm' fails when CONFIG_LOCALVERSION_AUTO=y and using a kernel source tree under SCM. This is due to KERNELRELEASE being different when the initial make is run and when make is run from rpmbuild. mkspec creates kernel.spec using KERNELRELEASE: <mkspec> echo "%files" echo '%defattr (-, root, root)' echo "%dir /lib/modules" echo "/lib/modules/$KERNELRELEASE" echo "/lib/firmware" echo "/boot/*" echo "" </mkspec> When CONFIG_LOCALVERSION_AUTO=y scripts/setlocalversion is called and grabs any additional version info from SCM. Next, the srctree is tarred up and SCM information is excluded. rpmbuild reruns make and in the process generates a new include/config/kernel.release and thus a new KERNELRELEASE. However this time the SCM information is gone so KERNELRELEASE no longer has the additional version information. When "make modules_install" runs, it uses the new KERNELRELEASE value to determine where to install the modules. This conflicts with where the spec file assumes they are going because of the mis-matching KERNELRELEASE versions. <snippet> + INSTALL_MOD_PATH=/var/tmp/kernel-2.6.29rc4tip01479g5d85422-root + make -j16 modules_install INSTALL crypto/aead.ko INSTALL crypto/cbc.ko INSTALL crypto/chainiv.ko INSTALL crypto/crc32c.ko INSTALL crypto/crypto_algapi.ko INSTALL crypto/crypto_blkcipher.ko INSTALL crypto/crypto_hash.ko INSTALL crypto/cryptomgr.ko INSTALL crypto/ecb.ko INSTALL crypto/eseqiv.ko INSTALL crypto/krng.ko INSTALL crypto/md5.ko INSTALL crypto/pcbc.ko INSTALL crypto/rng.ko INSTALL drivers/block/cciss.ko INSTALL drivers/hid/hid-dummy.ko INSTALL drivers/scsi/iscsi_tcp.ko INSTALL drivers/scsi/libiscsi.ko INSTALL drivers/scsi/libiscsi_tcp.ko INSTALL drivers/scsi/scsi_transport_iscsi.ko INSTALL drivers/scsi/scsi_wait_scan.ko INSTALL fs/lockd/lockd.ko INSTALL fs/nfs/nfs.ko INSTALL fs/nfsd/nfsd.ko INSTALL lib/libcrc32c.ko INSTALL net/sunrpc/sunrpc.ko DEPMOD 2.6.29-rc4-tip + cp arch/x86/boot/bzImage /var/tmp/kernel-2.6.29rc4tip01479g5d85422-root/boot/vmlinuz-2.6.29-rc4-tip-01479-g5d85422 + cp System.map /var/tmp/kernel-2.6.29rc4tip01479g5d85422-root/boot/System.map-2.6.29-rc4-tip-01479-g5d85422 + cp .config /var/tmp/kernel-2.6.29rc4tip01479g5d85422-root/boot/config-2.6.29-rc4-tip-01479-g5d85422 + cp vmlinux vmlinux.orig + bzip2 -9 vmlinux + mv vmlinux.bz2 /var/tmp/kernel-2.6.29rc4tip01479g5d85422-root/boot/vmlinux-2.6.29-rc4-tip-01479-g5d85422.bz2 + mv vmlinux.orig vmlinux + /usr/lib/rpm/brp-compress Processing files: kernel-2.6.29rc4tip01479g5d85422-2 error: File not found: /var/tmp/kernel-2.6.29rc4tip01479g5d85422-root/lib/modules/2.6.29-rc4-tip-01479-g5d85422 RPM build errors: File not found: /var/tmp/kernel-2.6.29rc4tip01479g5d85422-root/lib/modules/2.6.29-rc4-tip-01479-g5d85422 make[1]: *** [rpm] Error 1 make: *** [rpm] Error 2 </snippet> I have tested this patch on git -tip, Linus' git tree, and the kernel.org tar files, both with and without CONFIG_LOCALVERSION_AUTO=y. Signed-off-by: Josh Hunt <josh@scalex86.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> ----
2009-03-03Linux 2.6.29-rc7Linus Torvalds
2009-02-24Merge branches 'x86/acpi', 'x86/apic', 'x86/asm', 'x86/cleanups', 'x86/mm', ↵Ingo Molnar
'x86/signal' and 'x86/urgent'; commit 'v2.6.29-rc6' into x86/core
2009-02-22Linux 2.6.29-rc6Linus Torvalds
2009-02-22Merge branch 'linus' into x86/apicIngo Molnar
Conflicts: arch/x86/mach-default/setup.c Semantic conflict resolution: arch/x86/kernel/setup.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-20Merge branch 'x86/urgent' into x86/coreIngo Molnar
2009-02-17Merge branches 'x86/acpi', 'x86/apic', 'x86/cpudetect', 'x86/headers', ↵Ingo Molnar
'x86/paravirt', 'x86/urgent' and 'x86/xen'; commit 'v2.6.29-rc5' into x86/core
2009-02-15kbuild: create the source symlink earlier in the objdirAndi Kleen
It's useful to already have the source symlink in a objdir when one just runs make *config. Then one can do mkdir obj-allyes cd obj-allyes make -C ../sourcedir O=$(pwd) allyesconfig ./source/scripts/config --disable debug_info make CC=icecc -j18 without having to interrupt the make first just to get the source symlink. Signed-off-by: Andi Kleen <ak@linux.intel.com> [sam: deleted the other source symlink statement] Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2009-02-13Linux 2.6.29-rc5Linus Torvalds
2009-02-10stackprotector: update make rulesTejun Heo
Impact: no default -fno-stack-protector if stackp is enabled, cleanup Stackprotector make rules had the following problems. * cc support test and warning are scattered across makefile and kernel/panic.c. * -fno-stack-protector was always added regardless of configuration. Update such that cc support test and warning are contained in makefile and -fno-stack-protector is added iff stackp is turned off. While at it, prepare for 32bit support. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-08Linux 2.6.29-rc4Linus Torvalds
2009-01-28Linux 2.6.29-rc3Linus Torvalds
2009-01-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixesLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes: kbuild: fix kbuild.txt typos kbuild: print usage with no arguments in scripts/config Revert "kbuild: strip generated symbols from *.ko"
2009-01-26Merge branch 'for-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68k,m68knommu: merge header files Resolve trivial conflict in arch/m68knommu/include/asm/Kbuild
2009-01-16Linux 2.6.29-rc2Linus Torvalds
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