From b8b0618cf6fab3bd5b1da8c72f4b29847d81ac42 Mon Sep 17 00:00:00 2001 From: Cheng Renquan Date: Tue, 26 May 2009 16:03:07 +0800 Subject: kbuild: remove extra ifdef/endif of top Makefile 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, $(origin V) will get a value anyway, killing ifdef/endif is viable and safe. Furthermore, I've checked the minimal requirements from Documentation/Changes is GNU make 3.79.1, and that version of GNU make has support of origin function well already, so now it's safe to kill the outer conditional checking, without upgrading the minimal requirements. Signed-off-by: Cheng Renquan Signed-off-by: Sam Ravnborg --- Makefile | 26 +++++++++----------------- 1 file changed, 9 insertions(+), 17 deletions(-) (limited to 'Makefile') diff --git a/Makefile b/Makefile index 10651549208..0c8ee91bc26 100644 --- a/Makefile +++ b/Makefile @@ -35,10 +35,8 @@ MAKEFLAGS += -rR --no-print-directory # To put more focus on warnings, be less verbose as default # Use 'make V=1' to see the full commands -ifdef V - ifeq ("$(origin V)", "command line") - KBUILD_VERBOSE = $(V) - endif +ifeq ("$(origin V)", "command line") + KBUILD_VERBOSE = $(V) endif ifndef KBUILD_VERBOSE KBUILD_VERBOSE = 0 @@ -54,10 +52,8 @@ endif # See the file "Documentation/sparse.txt" for more details, including # where to get the "sparse" utility. -ifdef C - ifeq ("$(origin C)", "command line") - KBUILD_CHECKSRC = $(C) - endif +ifeq ("$(origin C)", "command line") + KBUILD_CHECKSRC = $(C) endif ifndef KBUILD_CHECKSRC KBUILD_CHECKSRC = 0 @@ -69,12 +65,10 @@ endif ifdef SUBDIRS KBUILD_EXTMOD ?= $(SUBDIRS) endif -ifdef M - ifeq ("$(origin M)", "command line") - KBUILD_EXTMOD := $(M) - endif -endif +ifeq ("$(origin M)", "command line") + KBUILD_EXTMOD := $(M) +endif # kbuild supports saving output files in a separate directory. # To locate output files in a separate directory two syntaxes are supported. @@ -98,10 +92,8 @@ ifeq ($(KBUILD_SRC),) # OK, Make called in directory where kernel src resides # Do we want to locate output files in a separate directory? -ifdef O - ifeq ("$(origin O)", "command line") - KBUILD_OUTPUT := $(O) - endif +ifeq ("$(origin O)", "command line") + KBUILD_OUTPUT := $(O) endif # That's our default target when none is given on the command line -- cgit v1.2.3 From 2521f2c228ad750701ba4702484e31d876dbc386 Mon Sep 17 00:00:00 2001 From: Peter Oberparleiter Date: Wed, 17 Jun 2009 16:28:08 -0700 Subject: gcov: add gcov profiling infrastructure 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 Cc: Andi Kleen Cc: Huang Ying Cc: Li Wei Cc: Michael Ellerman Cc: Ingo Molnar Cc: Heiko Carstens Cc: Martin Schwidefsky Cc: Rusty Russell Cc: WANG Cong Cc: Sam Ravnborg Cc: Jeff Dike Cc: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Makefile | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'Makefile') diff --git a/Makefile b/Makefile index ea63667617f..46e1c9d03d5 100644 --- a/Makefile +++ b/Makefile @@ -330,6 +330,7 @@ AFLAGS_MODULE = $(MODFLAGS) LDFLAGS_MODULE = CFLAGS_KERNEL = AFLAGS_KERNEL = +CFLAGS_GCOV = -fprofile-arcs -ftest-coverage # Use LINUXINCLUDE when you must reference the include/ directory. @@ -356,7 +357,7 @@ export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS -export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE +export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE # When compiling out-of-tree modules, put MODVERDIR in the module @@ -1216,8 +1217,8 @@ clean: archclean $(clean-dirs) \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ -o -name '*.symtypes' -o -name 'modules.order' \ - -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \ - -type f -print | xargs rm -f + -o -name 'Module.markers' -o -name '.tmp_*.o.*' \ + -o -name '*.gcno' \) -type f -print | xargs rm -f # mrproper - Delete all generated files, including .config # @@ -1421,8 +1422,8 @@ clean: $(clean-dirs) $(call cmd,rmfiles) @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 + -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ + -o -name '*.gcno' \) -type f -print | xargs rm -f help: @echo ' Building external modules.' -- cgit v1.2.3 From 28d0325ce6e0a52f53d8af687e6427fee59004d3 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 24 Jun 2009 16:25:37 -0700 Subject: Linux 2.6.31-rc1 --- Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'Makefile') diff --git a/Makefile b/Makefile index 46e1c9d03d5..d1216fea0c9 100644 --- a/Makefile +++ b/Makefile @@ -1,7 +1,7 @@ VERSION = 2 PATCHLEVEL = 6 -SUBLEVEL = 30 -EXTRAVERSION = +SUBLEVEL = 31 +EXTRAVERSION = -rc1 NAME = Man-Eating Seals of Antiquity # *DOCUMENTATION* -- cgit v1.2.3