litmus-rt.git - The LITMUS^RT kernel.

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author	Ingo Molnar <mingo@elte.hu>	2006-07-03 03:24:54 -0400
committer	Linus Torvalds <torvalds@g5.osdl.org>	2006-07-03 18:27:04 -0400
commit	8a25d5debff2daee280e83e09d8c25d67c26a972 (patch)
tree	3bccfef9acb66fc62863bfd6c16493c5e8c8e394 /include/linux/spinlock.h
parent	4ea2176dfa714882e88180b474e4cbcd888b70af (diff)

[PATCH] lockdep: prove spinlock rwlock locking correctness

Use the lock validator framework to prove spinlock and rwlock locking correctness. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Diffstat (limited to 'include/linux/spinlock.h')

-rw-r--r--

include/linux/spinlock.h

1 files changed, 46 insertions, 17 deletions

 /*
  * Pull the __raw*() functions/declarations (UP-nondebug doesnt need them):
  */
-#if defined(CONFIG_SMP)
+#ifdef CONFIG_SMP
 # include <asm/spinlock.h>
 #else
 # include <linux/spinlock_up.h>
 #endif
-#define spin_lock_init(lock)    do { *(lock) = SPIN_LOCK_UNLOCKED; } while (0)
+#ifdef CONFIG_DEBUG_SPINLOCK
-#define rwlock_init(lock)       do { *(lock) = RW_LOCK_UNLOCKED; } while (0)
+  extern void __spin_lock_init(spinlock_t *lock, const char *name,
+                               struct lock_class_key *key);
+# define spin_lock_init(lock)                                   \
+do {                                                            \
+        static struct lock_class_key __key;                     \
+                                                                \
+        __spin_lock_init((lock), #lock, &__key);                \
+} while (0)
+#else
+# define spin_lock_init(lock)                                   \
+        do { *(lock) = SPIN_LOCK_UNLOCKED; } while (0)
+#endif
+#ifdef CONFIG_DEBUG_SPINLOCK
+  extern void __rwlock_init(rwlock_t *lock, const char *name,
+                            struct lock_class_key *key);
+# define rwlock_init(lock)                                      \
+do {                                                            \
+        static struct lock_class_key __key;                     \
+                                                                \
+        __rwlock_init((lock), #lock, &__key);                   \
+} while (0)
+#else
+# define rwlock_init(lock)                                      \
+        do { *(lock) = RW_LOCK_UNLOCKED; } while (0)
+#endif
 #define spin_is_locked(lock)    __raw_spin_is_locked(&(lock)->raw_lock)
 #define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
  extern int _raw_spin_trylock(spinlock_t *lock);
  extern void _raw_spin_unlock(spinlock_t *lock);
  extern void _raw_read_lock(rwlock_t *lock);
  extern int _raw_read_trylock(rwlock_t *lock);
  extern void _raw_read_unlock(rwlock_t *lock);
  extern int _raw_write_trylock(rwlock_t *lock);
  extern void _raw_write_unlock(rwlock_t *lock);
 #else
-# define _raw_spin_unlock(lock)         __raw_spin_unlock(&(lock)->raw_lock)
-# define _raw_spin_trylock(lock)        __raw_spin_trylock(&(lock)->raw_lock)
 # define _raw_spin_lock(lock)           __raw_spin_lock(&(lock)->raw_lock)
 # define _raw_spin_lock_flags(lock, flags) \
                 __raw_spin_lock_flags(&(lock)->raw_lock, *(flags))
+# define _raw_spin_trylock(lock)        __raw_spin_trylock(&(lock)->raw_lock)
+# define _raw_spin_unlock(lock)         __raw_spin_unlock(&(lock)->raw_lock)
 # define _raw_read_lock(rwlock)         __raw_read_lock(&(rwlock)->raw_lock)
-# define _raw_write_lock(rwlock)        __raw_write_lock(&(rwlock)->raw_lock)
-# define _raw_read_unlock(rwlock)       __raw_read_unlock(&(rwlock)->raw_lock)
-# define _raw_write_unlock(rwlock)      __raw_write_unlock(&(rwlock)->raw_lock)
 # define _raw_read_trylock(rwlock)      __raw_read_trylock(&(rwlock)->raw_lock)
+# define _raw_read_unlock(rwlock)       __raw_read_unlock(&(rwlock)->raw_lock)
+# define _raw_write_lock(rwlock)        __raw_write_lock(&(rwlock)->raw_lock)
 # define _raw_write_trylock(rwlock)     __raw_write_trylock(&(rwlock)->raw_lock)
+# define _raw_write_unlock(rwlock)      __raw_write_unlock(&(rwlock)->raw_lock)
 #endif
 #define read_can_lock(rwlock)           __raw_read_can_lock(&(rwlock)->raw_lock)
 #define write_trylock(lock)             __cond_lock(_write_trylock(lock))
 #define spin_lock(lock)                 _spin_lock(lock)
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# define spin_lock_nested(lock, subclass) _spin_lock_nested(lock, subclass)
+#else
+# define spin_lock_nested(lock, subclass) _spin_lock(lock)
+#endif
 #define write_lock(lock)                _write_lock(lock)
 #define read_lock(lock)                 _read_lock(lock)
 /*
  * We inline the unlock functions in the nondebug case:
  */
-#if defined(CONFIG_DEBUG_SPINLOCK) || defined(CONFIG_PREEMPT) || !defined(CONFIG_SMP)
+#if defined(CONFIG_DEBUG_SPINLOCK) || defined(CONFIG_PREEMPT) || \
+        !defined(CONFIG_SMP)
 # define spin_unlock(lock)              _spin_unlock(lock)
 # define read_unlock(lock)              _read_unlock(lock)
 # define write_unlock(lock)             _write_unlock(lock)
-#else
-# define spin_unlock(lock)              __raw_spin_unlock(&(lock)->raw_lock)
-# define read_unlock(lock)              __raw_read_unlock(&(lock)->raw_lock)
-# define write_unlock(lock)             __raw_write_unlock(&(lock)->raw_lock)
-#endif
-#if defined(CONFIG_DEBUG_SPINLOCK) || defined(CONFIG_PREEMPT) || !defined(CONFIG_SMP)
 # define spin_unlock_irq(lock)          _spin_unlock_irq(lock)
 # define read_unlock_irq(lock)          _read_unlock_irq(lock)
 # define write_unlock_irq(lock)         _write_unlock_irq(lock)
 #else
+# define spin_unlock(lock)              __raw_spin_unlock(&(lock)->raw_lock)
+# define read_unlock(lock)              __raw_read_unlock(&(lock)->raw_lock)
+# define write_unlock(lock)             __raw_write_unlock(&(lock)->raw_lock)
 # define spin_unlock_irq(lock) \
     do { __raw_spin_unlock(&(lock)->raw_lock); local_irq_enable(); } while (0)
 # define read_unlock_irq(lock) \

VERSION = 2 PATCHLEVEL = 6 SUBLEVEL = 13 EXTRAVERSION =-rc6 NAME=Woozy Numbat # *DOCUMENTATION* # To see a list of typical targets execute "make help" # More info can be located in ./README # Comments in this file are targeted only to the developer, do not # expect to learn how to build the kernel reading this file. # Do not print "Entering directory ..." MAKEFLAGS += --no-print-directory # We are using a recursive build, so we need to do a little thinking # to get the ordering right. # # Most importantly: sub-Makefiles should only ever modify files in # their own directory. 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Default is /boot, but you can set it to other values export INSTALL_PATH ?= /boot # # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory # relocations required by build roots. This is not defined in the # makefile but the arguement can be passed to make if needed. # MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) export MODLIB ifeq ($(KBUILD_EXTMOD),) core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ $(net-y) $(net-m) $(libs-y) $(libs-m))) vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ $(init-n) $(init-) \ $(core-n) $(core-) $(drivers-n) $(drivers-) \ $(net-n) $(net-) $(libs-n) $(libs-)))) init-y := $(patsubst %/, %/built-in.o, $(init-y)) core-y := $(patsubst %/, %/built-in.o, $(core-y)) drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) net-y := $(patsubst %/, %/built-in.o, $(net-y)) libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) libs-y := $(libs-y1) $(libs-y2) # Build vmlinux # --------------------------------------------------------------------------- # vmlinux is build from the objects selected by $(vmlinux-init) and # $(vmlinux-main). Most are built-in.o files from top-level directories # in the kernel tree, others are specified in arch/$(ARCH)Makefile. # Ordering when linking is important, and $(vmlinux-init) must be first. # # vmlinux # ^ # | # +-< $(vmlinux-init) # | +--< init/version.o + more # | # +--< $(vmlinux-main) # | +--< driver/built-in.o mm/built-in.o + more # | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) # # vmlinux version (uname -v) cannot be updated during normal # descending-into-subdirs phase since we do not yet know if we need to # update vmlinux. # Therefore this step is delayed until just before final link of vmlinux - # except in the kallsyms case where it is done just before adding the # symbols to the kernel. # # System.map is generated to document addresses of all kernel symbols vmlinux-init := $(head-y) $(init-y) vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) vmlinux-all := $(vmlinux-init) $(vmlinux-main) vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds # Rule to link vmlinux - also used during CONFIG_KALLSYMS # May be overridden by arch/$(ARCH)/Makefile quiet_cmd_vmlinux__ ?= LD $@ cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ -T $(vmlinux-lds) $(vmlinux-init) \ --start-group $(vmlinux-main) --end-group \ $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) # Generate new vmlinux version quiet_cmd_vmlinux_version = GEN .version cmd_vmlinux_version = set -e; \ . $(srctree)/scripts/mkversion > .tmp_version; \ mv -f .tmp_version .version; \ $(MAKE) $(build)=init # Generate System.map quiet_cmd_sysmap = SYSMAP cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap # Link of vmlinux # If CONFIG_KALLSYMS is set .version is already updated # Generate System.map and verify that the content is consistent define rule_vmlinux__ $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) $(call cmd,vmlinux__) $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd $(Q)$(if $($(quiet)cmd_sysmap), \ echo ' $($(quiet)cmd_sysmap) System.map' &&) \ $(cmd_sysmap) $@ System.map; \ if [ $$? -ne 0 ]; then \ rm -f $@; \ /bin/false; \ fi; $(verify_kallsyms) endef ifdef CONFIG_KALLSYMS # Generate section listing all symbols and add it into vmlinux $(kallsyms.o) # It's a three stage process: # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is # empty # Running kallsyms on that gives us .tmp_kallsyms1.o with # the right size - vmlinux version (uname -v) is updated during this step # o .tmp_vmlinux2 now has a __kallsyms section of the right size, # but due to the added section, some addresses have shifted. # From here, we generate a correct .tmp_kallsyms2.o # o The correct .tmp_kallsyms2.o is linked into the final vmlinux. # o Verify that the System.map from vmlinux matches the map from # .tmp_vmlinux2, just in case we did not generate kallsyms correctly. # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a # temporary bypass to allow the kernel to be built while the # maintainers work out what went wrong with kallsyms. ifdef CONFIG_KALLSYMS_EXTRA_PASS last_kallsyms := 3 else last_kallsyms := 2 endif kallsyms.o := .tmp_kallsyms$(last_kallsyms).o define verify_kallsyms $(Q)$(if $($(quiet)cmd_sysmap), \ echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map $(Q)cmp -s System.map .tmp_System.map || \ (echo Inconsistent kallsyms data; \ echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ rm .tmp_kallsyms* ; /bin/false ) endef # Update vmlinux version before link # Use + in front of this rule to silent warning about make -j1 cmd_ksym_ld = $(cmd_vmlinux__) define rule_ksym_ld +$(call cmd,vmlinux_version) $(call cmd,vmlinux__) $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd endef # Generate .S file with all kernel symbols quiet_cmd_kallsyms = KSYM $@ cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE $(call if_changed_dep,as_o_S) .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) $(call cmd,kallsyms) # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE $(call if_changed_rule,ksym_ld) .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE $(call if_changed,vmlinux__) .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE $(call if_changed,vmlinux__) # Needs to visit scripts/ before $(KALLSYMS) can be used. $(KALLSYMS): scripts ; endif # ifdef CONFIG_KALLSYMS # vmlinux image - including updated kernel symbols vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE $(call if_changed_rule,vmlinux__) # The actual objects are generated when descending, # make sure no implicit rule kicks in $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; # Handle descending into subdirectories listed in $(vmlinux-dirs) # Preset locale variables to speed up the build process. Limit locale # tweaks to this spot to avoid wrong language settings when running # make menuconfig etc. # Error messages still appears in the original language .PHONY: $(vmlinux-dirs) $(vmlinux-dirs): prepare-all scripts $(Q)$(MAKE) $(build)=$@ # Things we need to do before we recursively start building the kernel # or the modules are listed in "prepare-all". # A multi level approach is used. prepare1 is updated first, then prepare0. # prepare-all is the collection point for the prepare targets. .PHONY: prepare-all prepare prepare0 prepare1 prepare2 # prepare2 is used to check if we are building in a separate output directory, # and if so do: # 1) Check that make has not been executed in the kernel src $(srctree) # 2) Create the include2 directory, used for the second asm symlink prepare2: ifneq ($(KBUILD_SRC),) @echo ' Using $(srctree) as source for kernel' $(Q)if [ -h $(srctree)/include/asm -o -f $(srctree)/.config ]; then \ echo " $(srctree) is not clean, please run 'make mrproper'";\ echo " in the '$(srctree)' directory.";\ /bin/false; \ fi; $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm endif # prepare1 creates a makefile if using a separate output directory prepare1: prepare2 outputmakefile prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER ifneq ($(KBUILD_MODULES),) $(Q)rm -rf $(MODVERDIR) $(Q)mkdir -p $(MODVERDIR) endif # All the preparing.. prepare-all: prepare0 prepare # Leave this as default for preprocessing vmlinux.lds.S, which is now # done in arch/$(ARCH)/kernel/Makefile export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) # Single targets # --------------------------------------------------------------------------- %.s: %.c scripts FORCE $(Q)$(MAKE) $(build)=$(@D) $@ %.i: %.c scripts FORCE $(Q)$(MAKE) $(build)=$(@D) $@ %.o: %.c scripts FORCE $(Q)$(MAKE) $(build)=$(@D) $@ %.ko: scripts FORCE $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o) $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost %/: scripts prepare FORCE $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) %.lst: %.c scripts FORCE $(Q)$(MAKE) $(build)=$(@D) $@ %.s: %.S scripts FORCE $(Q)$(MAKE) $(build)=$(@D) $@ %.o: %.S scripts FORCE $(Q)$(MAKE) $(build)=$(@D) $@ # FIXME: The asm symlink changes when $(ARCH) changes. That's # hard to detect, but I suppose "make mrproper" is a good idea # before switching between archs anyway. include/asm: @echo ' SYMLINK $@ -> include/asm-$(ARCH)' $(Q)if [ ! -d include ]; then mkdir -p include; fi; @ln -fsn asm-$(ARCH) $@ # Split autoconf.h into include/linux/config/* include/config/MARKER: include/linux/autoconf.h @echo ' SPLIT include/linux/autoconf.h -> include/config/*' @scripts/basic/split-include include/linux/autoconf.h include/config @touch $@ # Generate some files # --------------------------------------------------------------------------- # KERNELRELEASE can change from a few different places, meaning version.h # needs to be updated, so this check is forced on all builds uts_len := 64 define filechk_version.h if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ exit 1; \ fi; \ (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ ) endef include/linux/version.h: $(srctree)/Makefile FORCE $(call filechk,version.h) # --------------------------------------------------------------------------- .PHONY: depend dep depend dep: @echo '*** Warning: make $@ is unnecessary now.' # --------------------------------------------------------------------------- # Modules ifdef CONFIG_MODULES # By default, build modules as well all: modules # Build modules .PHONY: modules modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) @echo ' Building modules, stage 2.'; $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost # Target to prepare building external modules .PHONY: modules_prepare modules_prepare: prepare-all scripts # Target to install modules .PHONY: modules_install modules_install: _modinst_ _modinst_post .PHONY: _modinst_ _modinst_: @if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \ echo "Warning: you may need to install module-init-tools"; \ echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ sleep 1; \ fi @rm -rf $(MODLIB)/kernel @rm -f $(MODLIB)/source @mkdir -p $(MODLIB)/kernel @ln -s $(srctree) $(MODLIB)/source @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ rm -f $(MODLIB)/build ; \ ln -s $(objtree) $(MODLIB)/build ; \ fi $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst # If System.map exists, run depmod. This deliberately does not have a # dependency on System.map since that would run the dependency tree on # vmlinux. This depmod is only for convenience to give the initial # boot a modules.dep even before / is mounted read-write. However the # boot script depmod is the master version. ifeq "$(strip $(INSTALL_MOD_PATH))" "" depmod_opts := else depmod_opts := -b $(INSTALL_MOD_PATH) -r endif .PHONY: _modinst_post _modinst_post: _modinst_ if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi else # CONFIG_MODULES # Modules not configured # --------------------------------------------------------------------------- modules modules_install: FORCE @echo @echo "The present kernel configuration has modules disabled." @echo "Type 'make config' and enable loadable module support." @echo "Then build a kernel with module support enabled." @echo @exit 1 endif # CONFIG_MODULES # Generate asm-offsets.h # --------------------------------------------------------------------------- define filechk_gen-asm-offsets (set -e; \ echo "#ifndef __ASM_OFFSETS_H__"; \ echo "#define __ASM_OFFSETS_H__"; \ echo "/*"; \ echo " * DO NOT MODIFY."; \ echo " *"; \ echo " * This file was generated by arch/$(ARCH)/Makefile"; \ echo " *"; \ echo " */"; \ echo ""; \ sed -ne "/^->/{s:^->$[^ ]*$ [\$$#]*$[^ ]*$ $.*$:#define \1 \2 /* \3 */:; s:->::; p;}"; \ echo ""; \ echo "#endif" ) endef ### # Cleaning is done on three levels. # make clean Delete most generated files # Leave enough to build external modules # make mrproper Delete the current configuration, and all generated files # make distclean Remove editor backup files, patch leftover files and the like # Directories & files removed with 'make clean' CLEAN_DIRS += $(MODVERDIR) CLEAN_FILES += vmlinux System.map \ .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map # Directories & files removed with 'make mrproper' MRPROPER_DIRS += include/config include2 MRPROPER_FILES += .config .config.old include/asm .version \ include/linux/autoconf.h include/linux/version.h \ Module.symvers tags TAGS cscope* # clean - Delete most, but leave enough to build external modules # clean: rm-dirs := $(CLEAN_DIRS) clean: rm-files := $(CLEAN_FILES) clean-dirs := $(addprefix _clean_,$(vmlinux-alldirs)) .PHONY: $(clean-dirs) clean archclean $(clean-dirs): $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) clean: archclean $(clean-dirs) $(call cmd,rmdirs) $(call cmd,rmfiles) @find . $(RCS_FIND_IGNORE) \ $ -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' $ \ -type f -print | xargs rm -f # mrproper - Delete all generated files, including .config # mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) .PHONY: $(mrproper-dirs) mrproper archmrproper $(mrproper-dirs): $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) mrproper: clean archmrproper $(mrproper-dirs) $(call cmd,rmdirs) $(call cmd,rmfiles) # distclean # .PHONY: distclean distclean: mrproper @find $(srctree) $(RCS_FIND_IGNORE) \ $ -name '*.orig' -o -name '*.rej' -o -name '*~' \ -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ -o -name '.*.rej' -o -size 0 \ -o -name '*%' -o -name '.*.cmd' -o -name 'core' $ \ -type f -print | xargs rm -f # Packaging of the kernel to various formats # --------------------------------------------------------------------------- # rpm target kept for backward compatibility package-dir := $(srctree)/scripts/package .PHONY: %-pkg rpm %pkg: FORCE $(Q)$(MAKE) -f $(package-dir)/Makefile $@ rpm: FORCE $(Q)$(MAKE) -f $(package-dir)/Makefile $@ # Brief documentation of the typical targets used # --------------------------------------------------------------------------- boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) boards := $(notdir $(boards)) help: @echo 'Cleaning targets:' @echo ' clean - remove most generated files but keep the config' @echo ' mrproper - remove all generated files + config + various backup files' @echo '' @echo 'Configuration targets:' @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help @echo '' @echo 'Other generic targets:' @echo ' all - Build all targets marked with [*]' @echo '* vmlinux - Build the bare kernel' @echo '* modules - Build all modules' @echo ' modules_install - Install all modules' @echo ' dir/ - Build all files in dir and below' @echo ' dir/file.[ois] - Build specified target only' @echo ' dir/file.ko - Build module including final link' @echo ' rpm - Build a kernel as an RPM package' @echo ' tags/TAGS - Generate tags file for editors' @echo ' cscope - Generate cscope index' @echo '' @echo 'Static analysers' @echo ' buildcheck - List dangling references to vmlinux discarded sections' @echo ' and init sections from non-init sections' @echo ' checkstack - Generate a list of stack hogs' @echo ' namespacecheck - Name space analysis on compiled kernel' @echo '' @echo 'Kernel packaging:' @$(MAKE) -f $(package-dir)/Makefile help @echo '' @echo 'Documentation targets:' @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp @echo '' @echo 'Architecture specific targets ($(ARCH)):' @$(if $(archhelp),$(archhelp),\ echo ' No architecture specific help defined for $(ARCH)') @echo '' @$(if $(boards), \ $(foreach b, $(boards), \ printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ echo '') @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' @echo ' make O=dir [targets] Locate all output files in "dir", including .config' @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)' @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)' @echo '' @echo 'Execute "make" or "make all" to build all targets marked with [*] ' @echo 'For further info see the ./README file' # Documentation targets # --------------------------------------------------------------------------- %docs: scripts_basic FORCE $(Q)$(MAKE) $(build)=Documentation/DocBook $@ else # KBUILD_EXTMOD ### # External module support. # When building external modules the kernel used as basis is considered # read-only, and no consistency checks are made and the make # system is not used on the basis kernel. If updates are required # in the basis kernel ordinary make commands (without M=...) must # be used. # # The following are the only valid targets when building external # modules. # make M=dir clean Delete all automatically generated files # make M=dir modules Make all modules in specified dir # make M=dir Same as 'make M=dir modules' # make M=dir modules_install # Install the modules build in the module directory # Assumes install directory is already created # We are always building modules KBUILD_MODULES := 1 .PHONY: crmodverdir crmodverdir: $(Q)mkdir -p $(MODVERDIR) .PHONY: $(objtree)/Module.symvers $(objtree)/Module.symvers: @test -e $(objtree)/Module.symvers || ( \ echo; \ echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ echo " is missing; modules will have no dependencies and modversions."; \ echo ) module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) .PHONY: $(module-dirs) modules $(module-dirs): crmodverdir $(objtree)/Module.symvers $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) modules: $(module-dirs) @echo ' Building modules, stage 2.'; $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost .PHONY: modules_install modules_install: $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) .PHONY: $(clean-dirs) clean $(clean-dirs): $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) clean: rm-dirs := $(MODVERDIR) clean: $(clean-dirs) $(call cmd,rmdirs) @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ $ -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' $ \ -type f -print | xargs rm -f help: @echo ' Building external modules.' @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' @echo '' @echo ' modules - default target, build the module(s)' @echo ' modules_install - install the module' @echo ' clean - remove generated files in module directory only' @echo '' endif # KBUILD_EXTMOD # Generate tags for editors # --------------------------------------------------------------------------- #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. #Adding $(srctree) adds about 20M on i386 to the size of the output file! ifeq ($(src),$(obj)) __srctree = else __srctree = $(srctree)/ endif define all-sources ( find $(__srctree) $(RCS_FIND_IGNORE) \ $ -name include -o -name arch $ -prune -o \ -name '*.[chS]' -print; \ find $(__srctree)arch/$(ARCH) $(RCS_FIND_IGNORE) \ -name '*.[chS]' -print; \ find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ -name '*.[chS]' -print; \ find $(__srctree)include $(RCS_FIND_IGNORE) \ $ -name config -o -name 'asm-*' $ -prune \ -o -name '*.[chS]' -print; \ find $(__srctree)include/asm-$(ARCH) $(RCS_FIND_IGNORE) \ -name '*.[chS]' -print; \ find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ -name '*.[chS]' -print ) endef quiet_cmd_cscope-file = FILELST cscope.files cmd_cscope-file = $(all-sources) > cscope.files quiet_cmd_cscope = MAKE cscope.out cmd_cscope = cscope -k -b -q cscope: FORCE $(call cmd,cscope-file) $(call cmd,cscope) quiet_cmd_TAGS = MAKE $@ cmd_TAGS = $(all-sources) | etags - # Exuberant ctags works better with -I quiet_cmd_tags = MAKE $@ define cmd_tags rm -f $@; \ CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \ $(all-sources) | xargs ctags $$CTAGSF -a endef TAGS: FORCE $(call cmd,TAGS) tags: FORCE $(call cmd,tags) # Scripts to check various things for consistency # --------------------------------------------------------------------------- configcheck: find * $(RCS_FIND_IGNORE) \ -name '*.[hcS]' -type f -print | sort \ | xargs $(PERL) -w scripts/checkconfig.pl includecheck: find * $(RCS_FIND_IGNORE) \ -name '*.[hcS]' -type f -print | sort \ | xargs $(PERL) -w scripts/checkincludes.pl versioncheck: find * $(RCS_FIND_IGNORE) \ -name '*.[hcS]' -type f -print | sort \ | xargs $(PERL) -w scripts/checkversion.pl buildcheck: $(PERL) $(srctree)/scripts/reference_discarded.pl $(PERL) $(srctree)/scripts/reference_init.pl namespacecheck: $(PERL) $(srctree)/scripts/namespace.pl endif #ifeq ($(config-targets),1) endif #ifeq ($(mixed-targets),1) .PHONY: checkstack checkstack: $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ $(PERL) $(src)/scripts/checkstack.pl $(ARCH) kernelrelease: @echo $(KERNELRELEASE) # FIXME Should go into a make.lib or something # =========================================================================== quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) cmd_rmdirs = rm -rf $(rm-dirs) quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) cmd_rmfiles = rm -f $(rm-files) a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ $(NOSTDINC_FLAGS) $(CPPFLAGS) \ $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) quiet_cmd_as_o_S = AS $@ cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< # read all saved command lines targets := $(wildcard $(sort $(targets))) cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) ifneq ($(cmd_files),) $(cmd_files): ; # Do not try to update included dependency files include $(cmd_files) endif # Execute command and generate cmd file if_changed = $(if $(strip $? \ $(filter-out $(cmd_$(1)),$(cmd_$@))\ $(filter-out $(cmd_$@),$(cmd_$(1)))),\ @set -e; \ $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ $(cmd_$(1)); \ echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd) # execute the command and also postprocess generated .d dependencies # file if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\ $(filter-out $(cmd_$(1)),$(cmd_$@))\ $(filter-out $(cmd_$@),$(cmd_$(1)))),\ $(Q)set -e; \ $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ $(cmd_$(1)); \ scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \ rm -f $(depfile); \ mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd) # Usage: $(call if_changed_rule,foo) # will check if $(cmd_foo) changed, or any of the prequisites changed, # and if so will execute $(rule_foo) if_changed_rule = $(if $(strip $? \ $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\ $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\ $(Q)$(rule_$(1))) # If quiet is set, only print short version of command cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1)) # filechk is used to check if the content of a generated file is updated. # Sample usage: # define filechk_sample # echo $KERNELRELEASE # endef # version.h : Makefile # $(call filechk,sample) # The rule defined shall write to stdout the content of the new file. # The existing file will be compared with the new one. # - If no file exist it is created # - If the content differ the new file is used # - If they are equal no change, and no timestamp update define filechk @set -e; \ echo ' CHK $@'; \ mkdir -p $(dir $@); \ $(filechk_$(1)) < $< > $@.tmp; \ if [ -r $@ ] && cmp -s $@ $@.tmp; then \ rm -f $@.tmp; \ else \ echo ' UPD $@'; \ mv -f $@.tmp $@; \ fi endef # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir # Usage: # $(Q)$(MAKE) $(build)=dir build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir # Usage: # $(Q)$(MAKE) $(clean)=dir clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj # $(call descend,<dir>,<target>) # Recursively call a sub-make in <dir> with target <target> # Usage is deprecated, because make does not see this as an invocation of make. descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2) endif # skip-makefile FORCE:


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