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* driver core: basic infrastructure for per-module dynamic debug messagesJason Baron2008-10-161-1/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Base infrastructure to enable per-module debug messages. I've introduced CONFIG_DYNAMIC_PRINTK_DEBUG, which when enabled centralizes control of debugging statements on a per-module basis in one /proc file, currently, <debugfs>/dynamic_printk/modules. When, CONFIG_DYNAMIC_PRINTK_DEBUG, is not set, debugging statements can still be enabled as before, often by defining 'DEBUG' for the proper compilation unit. Thus, this patch set has no affect when CONFIG_DYNAMIC_PRINTK_DEBUG is not set. The infrastructure currently ties into all pr_debug() and dev_dbg() calls. That is, if CONFIG_DYNAMIC_PRINTK_DEBUG is set, all pr_debug() and dev_dbg() calls can be dynamically enabled/disabled on a per-module basis. Future plans include extending this functionality to subsystems, that define their own debug levels and flags. Usage: Dynamic debugging is controlled by the debugfs file, <debugfs>/dynamic_printk/modules. This file contains a list of the modules that can be enabled. The format of the file is as follows: <module_name> <enabled=0/1> . . . <module_name> : Name of the module in which the debug call resides <enabled=0/1> : whether the messages are enabled or not For example: snd_hda_intel enabled=0 fixup enabled=1 driver enabled=0 Enable a module: $echo "set enabled=1 <module_name>" > dynamic_printk/modules Disable a module: $echo "set enabled=0 <module_name>" > dynamic_printk/modules Enable all modules: $echo "set enabled=1 all" > dynamic_printk/modules Disable all modules: $echo "set enabled=0 all" > dynamic_printk/modules Finally, passing "dynamic_printk" at the command line enables debugging for all modules. This mode can be turned off via the above disable command. [gkh: minor cleanups and tweaks to make the build work quietly] Signed-off-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* kbuild: create new CFLAGS_REMOVE_(basename).o optionSteven Rostedt2008-05-231-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We currently have a way to add special CFLAGS to code, but we do not have a way to remove them if needed. With the case of ftrace, some files should simply not be profiled. Adding the -pg flag to these files is simply a waste, and adding "notrace" to each and every function is ugly. Currently we put in "Makefile turd" [1] to stop the compiler from adding -pg to certain files. This was clumsy and awkward. This patch now adds the revese of CFLAGS_(basename).o with CFLAGS_REMOVE_(basename).o. This allows developers to prevent certain CFLAGS from being used to compile files. For example, we can now do CFLAGS_REMOVE_string.o = -pg to remove the -pg option from the string.o file in the lib directory. Note: a space delimited list of options may be added to the REMOVE macro. [1] - what David Miller called the workaronud to remove -pg Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* kbuild: implement modules.orderTejun Heo2008-01-281-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When multiple built-in modules (especially drivers) provide the same capability, they're prioritized by link order specified by the order listed in Makefile. This implicit ordering is lost for loadable modules. When driver modules are loaded by udev, what comes first in modules.alias file is selected. However, the order in this file is indeterministic (depends on filesystem listing order of installed modules). This causes confusion. The solution is two-parted. This patch updates kbuild such that it generates and installs modules.order which contains the name of modules ordered according to Makefile. The second part is update to depmod such that it generates output files according to this file. Note that both obj-y and obj-m subdirs can contain modules and ordering information between those two are lost from beginning. Currently obj-y subdirs are put before obj-m subdirs. Sam Ravnborg cleaned up Makefile modifications and suggested using awk to remove duplicate lines from modules.order instead of using separate C program. Signed-off-by: Tejun Heo <htejun@gmail.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Cc: Bill Nottingham <notting@redhat.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Jon Masters <jonathan@jonmasters.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* kbuild: introduce ccflags-y, asflags-y and ldflags-ySam Ravnborg2007-10-151-5/+11
| | | | | | | | | | | | | | | | | | | | Introduce ccflags-y, asflags-y and ldflags-y so we soon can deprecate use of EXTRA_CFLAGS, EXTRA_AFLAGS and EXTRA_LDFLAGS. This patch does not touch any in-tree users - thats next round. Lets get this committed first and then fix the users of the soon to be deprecated variants next. The rationale behind this change is to introduce support for makefile fragments like: ccflags-$(CONFIG_WHATEVER_DEBUG) := -DDEBUG As a replacement for the uglier: ifeq ($(CONFIG_WHATEVER_DEBUG),y) EXTRA_CFLAGS := -DDEBUG endif Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* kbuild: enable 'make CPPFLAGS=...' to add additional options to CPPSam Ravnborg2007-10-151-3/+3
| | | | | | | | | | | | | | | The variable CPPFLAGS is a wellknown variable and the usage by kbuild may result in unexpected behaviour. This patch replace use of CPPFLAGS with KBUILD_CPPFLAGS all over the tree and enabling one to use: make CPPFLAGS=... to specify additional CPP commandline options. Patch was tested on following architectures: alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68k, s390 Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* kbuild: enable 'make AFLAGS=...' to add additional options to ASSam Ravnborg2007-10-151-1/+1
| | | | | | | | | | | | | | | The variable AFLAGS is a wellknown variable and the usage by kbuild may result in unexpected behaviour. On top of that several people over time has asked for a way to pass in additional flags to gcc. This patch replace use of AFLAGS with KBUILD_AFLAGS all over the tree. Patch was tested on following architectures: alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68k, s390 Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* kbuild: enable 'make CFLAGS=...' to add additional options to CCSam Ravnborg2007-10-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | The variable CFLAGS is a wellknown variable and the usage by kbuild may result in unexpected behaviour. On top of that several people over time has asked for a way to pass in additional flags to gcc. This patch replace use of CFLAGS with KBUILD_CFLAGS all over the tree and enabling one to use: make CFLAGS=... to specify additional gcc commandline options. One usecase is when trying to find gcc bugs but other use cases has been requested too. Patch was tested on following architectures: alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68k Test was simple to do a defconfig build, apply the patch and check that nothing got rebuild. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* kbuild: kill backward compatibility checksSam Ravnborg2007-10-121-3/+1
| | | | | | | | | | | | These checks has been present for several kernel releases (> 5). So lets just get rid of them. With this we no longer check for use of: EXTRA_TARGETS, O_TARGET, L_TARGET, list-multi, export-objs There were three remaining in-tree users of O_TARGET in some unmaintained sh64 code - mail sent to the maintainer + list. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* kbuild: fix directory traversal bugSam Ravnborg2007-10-121-3/+3
| | | | | | | | | | | | Previously kbuild choked over the following: obj-y += ../../../arch/i386/kernel/bootflag.o This has resulted in some rather ugly workarounds in current x86_64 tree. This patch fixes kbuild to allow the above and enable potential cleanups in x86_64 and maybe in other places. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* kbuild: fix ia64 breakage after introducing make -rRSam Ravnborg2006-07-011-3/+3
| | | | | | | | | | | | | | | | | | kbuild used $¤(*F to get filename of target without extension. This was used in several places all over kbuild, but introducing make -rR broke his for all cases where we specified full path to target/prerequsite. It is assumed that make -rR disables old style suffix-rules which is why is suddenly failed. ia64 was impacted by this change because several div* routines in arch/ia64/lib are build using explicit paths and then kbuild failed. Thanks to David Mosberger-Tang <David.Mosberger@acm.org> for an explanation what was the root-cause and for testing on ia64. This patch also fixes two uses of $(*F) in arch/um Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* Revert "kbuild: fix make -rR breakage"Linus Torvalds2006-06-261-3/+3
| | | | | | | | | | | | | | | | | | | This reverts commit e5c44fd88c146755da6941d047de4d97651404a9. Thanks to Daniel Ritz and Michal Piotrowski for noticing the problem. Daniel says: "[The] reason is a recent change that made modules always shows as module.mod. it breaks modprobe and probably many scripts..besides lsmod looking horrible stuff like this in modprobe.conf: install pcmcia_core /sbin/modprobe --ignore-install pcmcia_core; /sbin/modprobe pcmcia makes modprobe fork/exec endlessly calling itself...until oom interrupts it" Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* kbuild: fix make -rR breakageSam Ravnborg2006-06-241-3/+3
| | | | | | | | | make failed to supply the filename when using make -rR and using $(*F) to get target filename without extension. This bug was not reproduceable in small scale but using: $(basename $(notdir $@)) fixes it with same functionality. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* kbuild: properly pass options to hostcc when doing make O=..Sam Ravnborg2006-04-071-5/+0
| | | | | | | | | | | This fix a longstanding bug where proper options was not passed to hostcc in case of a make O=.. build. This bug showed up in (not yet merged) klibc, and is not known to have any counterpart in-kernel. Fixed by moving the flags macro to Kbuild.include so it can be used by both Makefile.lib and Makefile.host. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* kbuild: set correct KBUILD_MODNAME when using well known kernel symbols as ↵Ustyugov Roman2005-12-261-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | module names This patch fixes a problem when we use well known kernel symbols as module names. For example, if module source name is current.c, idle_stack.c or etc., we have a bad KBUILD_MODNAME value. For example, KBUILD_MODNAME will be "get_current()" instead of "current", or "(init_thread_union.stack)" instead of "idle_task". The trick is to define a stringify macro on the commandline - named KBUILD_STR for namespace reasons - and then to stringify the module name. There are a few uses of KBUILD_MODNAME throughout the tree but the usage is for debug and will not be harmed by this change so left untouched for now. While at it KBUILD_BASENAME was changed too. Any spinlock usage in the unix module would have created wrong section names without it. Usage in spinlock.h fixed so it no longer stringify KBUILD_BASENAME. Original patch from Ustyogov Roman - all bugs introduced by me. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* kbuild: introduce Kbuild.includeSam Ravnborg2005-07-251-94/+0
| | | | | | | | | | Kbuild.include is a placeholder for definitions originally present in both the top-level Makefile and scripts/Makefile.build. There were a slight difference in the filechk definition, so the most videly used version was kept and usr/Makefile was adopted for this syntax. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> ---
* kbuild: drop descend - converting existing usersSam Ravnborg2005-07-251-5/+0
| | | | | | | | | There was only two users left of descend. Fix them so they use $(clean)= and $(build)=. Drop definition of descend. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> ---
* Linux-2.6.12-rc2Linus Torvalds2005-04-161-0/+267
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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