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authorLinus Torvalds <torvalds@linux-foundation.org>2009-04-13 12:20:01 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-13 12:20:01 -0700
commit80a04d3f2f94fb68b5df05e3ac6697130bc3467a (patch)
tree792449152961db67e4a2855af4518db55822ff64
parenteebb2afb82c4f999e850d198af26ce6969d0f47a (diff)
parent2810ae8c73cbfb37891aa99dfbca46ffd40dbc91 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes: docbook: make cleandocs kbuild: fix spurious initramfs rebuild Documentation: explain the difference between __bitwise and __bitwise__ kbuild: make it possible for the linker to discard local symbols from vmlinux kbuild: remove pointless strdup() on arguments passed to new_module() in modpost kbuild: fix a few typos in top-level Makefile kbuild: introduce destination-y for exported headers kbuild: use git svn instead of git-svn in setlocalversion kconfig: fix update-po-config to accect backslash in input kbuild: fix option processing for -I in headerdep
-rw-r--r--Documentation/DocBook/Makefile11
-rw-r--r--Documentation/kbuild/makefiles.txt83
-rw-r--r--Documentation/sparse.txt8
-rw-r--r--Makefile8
-rw-r--r--init/Kconfig8
-rw-r--r--scripts/Makefile.headersinst2
-rw-r--r--scripts/gen_initramfs_list.sh2
-rwxr-xr-xscripts/headerdep.pl2
-rw-r--r--scripts/kconfig/kxgettext.c4
-rw-r--r--scripts/mod/modpost.c4
-rwxr-xr-xscripts/setlocalversion2
11 files changed, 116 insertions, 18 deletions
diff --git a/Documentation/DocBook/Makefile b/Documentation/DocBook/Makefile
index a3a83d38f96..8918a32c6b3 100644
--- a/Documentation/DocBook/Makefile
+++ b/Documentation/DocBook/Makefile
@@ -31,7 +31,7 @@ PS_METHOD = $(prefer-db2x)
###
# The targets that may be used.
-PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs
+PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs cleandocs
BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
xmldocs: $(BOOKS)
@@ -213,11 +213,12 @@ silent_gen_xml = :
dochelp:
@echo ' Linux kernel internal documentation in different formats:'
@echo ' htmldocs - HTML'
- @echo ' installmandocs - install man pages generated by mandocs'
- @echo ' mandocs - man pages'
@echo ' pdfdocs - PDF'
@echo ' psdocs - Postscript'
@echo ' xmldocs - XML DocBook'
+ @echo ' mandocs - man pages'
+ @echo ' installmandocs - install man pages generated by mandocs'
+ @echo ' cleandocs - clean all generated DocBook files'
###
# Temporary files left by various tools
@@ -235,6 +236,10 @@ clean-files := $(DOCBOOKS) \
clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
+cleandocs:
+ $(Q)rm -f $(call objectify, $(clean-files))
+ $(Q)rm -rf $(call objectify, $(clean-dirs))
+
# Declare the contents of the .PHONY variable as phony. We keep that
# information in a variable se we can use it in if_changed and friends.
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index 51104f9194a..d4b05672f9f 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -40,10 +40,16 @@ This document describes the Linux kernel Makefiles.
--- 6.7 Custom kbuild commands
--- 6.8 Preprocessing linker scripts
- === 7 Kbuild Variables
- === 8 Makefile language
- === 9 Credits
- === 10 TODO
+ === 7 Kbuild syntax for exported headers
+ --- 7.1 header-y
+ --- 7.2 objhdr-y
+ --- 7.3 destination-y
+ --- 7.4 unifdef-y (deprecated)
+
+ === 8 Kbuild Variables
+ === 9 Makefile language
+ === 10 Credits
+ === 11 TODO
=== 1 Overview
@@ -1143,8 +1149,69 @@ When kbuild executes, the following steps are followed (roughly):
The kbuild infrastructure for *lds file are used in several
architecture-specific files.
+=== 7 Kbuild syntax for exported headers
+
+The kernel include a set of headers that is exported to userspace.
+Many headers can be exported as-is but other headers requires a
+minimal pre-processing before they are ready for user-space.
+The pre-processing does:
+- drop kernel specific annotations
+- drop include of compiler.h
+- drop all sections that is kernel internat (guarded by ifdef __KERNEL__)
+
+Each relevant directory contain a file name "Kbuild" which specify the
+headers to be exported.
+See subsequent chapter for the syntax of the Kbuild file.
+
+ --- 7.1 header-y
+
+ header-y specify header files to be exported.
+
+ Example:
+ #include/linux/Kbuild
+ header-y += usb/
+ header-y += aio_abi.h
+
+ The convention is to list one file per line and
+ preferably in alphabetic order.
+
+ header-y also specify which subdirectories to visit.
+ A subdirectory is identified by a trailing '/' which
+ can be seen in the example above for the usb subdirectory.
+
+ Subdirectories are visited before their parent directories.
+
+ --- 7.2 objhdr-y
+
+ objhdr-y specifies generated files to be exported.
+ Generated files are special as they need to be looked
+ up in another directory when doing 'make O=...' builds.
+
+ Example:
+ #include/linux/Kbuild
+ objhdr-y += version.h
+
+ --- 7.3 destination-y
+
+ When an architecture have a set of exported headers that needs to be
+ exported to a different directory destination-y is used.
+ destination-y specify the destination directory for all exported
+ headers in the file where it is present.
+
+ Example:
+ #arch/xtensa/platforms/s6105/include/platform/Kbuild
+ destination-y := include/linux
+
+ In the example above all exported headers in the Kbuild file
+ will be located in the directory "include/linux" when exported.
+
+
+ --- 7.4 unifdef-y (deprecated)
+
+ unifdef-y is deprecated. A direct replacement is header-y.
+
-=== 7 Kbuild Variables
+=== 8 Kbuild Variables
The top Makefile exports the following variables:
@@ -1206,7 +1273,7 @@ The top Makefile exports the following variables:
INSTALL_MOD_STRIP will used as the option(s) to the strip command.
-=== 8 Makefile language
+=== 9 Makefile language
The kernel Makefiles are designed to be run with GNU Make. The Makefiles
use only the documented features of GNU Make, but they do use many
@@ -1225,14 +1292,14 @@ time the left-hand side is used.
There are some cases where "=" is appropriate. Usually, though, ":="
is the right choice.
-=== 9 Credits
+=== 10 Credits
Original version made by Michael Elizabeth Chastain, <mailto:mec@shout.net>
Updates by Kai Germaschewski <kai@tp1.ruhr-uni-bochum.de>
Updates by Sam Ravnborg <sam@ravnborg.org>
Language QA by Jan Engelhardt <jengelh@gmx.de>
-=== 10 TODO
+=== 11 TODO
- Describe how kbuild supports shipped files with _shipped.
- Generating offset header files.
diff --git a/Documentation/sparse.txt b/Documentation/sparse.txt
index 42f43fa59f2..34c76a55bc0 100644
--- a/Documentation/sparse.txt
+++ b/Documentation/sparse.txt
@@ -42,6 +42,14 @@ sure that bitwise types don't get mixed up (little-endian vs big-endian
vs cpu-endian vs whatever), and there the constant "0" really _is_
special.
+__bitwise__ - to be used for relatively compact stuff (gfp_t, etc.) that
+is mostly warning-free and is supposed to stay that way. Warnings will
+be generated without __CHECK_ENDIAN__.
+
+__bitwise - noisy stuff; in particular, __le*/__be* are that. We really
+don't want to drown in noise unless we'd explicitly asked for it.
+
+
Getting sparse
~~~~~~~~~~~~~~
diff --git a/Makefile b/Makefile
index e5ad5fd9617..ad830bd45a4 100644
--- a/Makefile
+++ b/Makefile
@@ -567,7 +567,7 @@ KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
# disable pointer signed / unsigned warnings in gcc 4.0
KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
-# disable invalid "can't wrap" optimzations for signed / pointers
+# disable invalid "can't wrap" optimizations for signed / pointers
KBUILD_CFLAGS += $(call cc-option,-fwrapv)
# revert to pre-gcc-4.4 behaviour of .eh_frame
@@ -597,6 +597,10 @@ LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
+ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
+LDFLAGS_vmlinux += -X
+endif
+
# Default kernel image to build when no specific target is given.
# KBUILD_IMAGE may be overruled on the command line or
# set in the environment
@@ -1587,5 +1591,5 @@ PHONY += FORCE
FORCE:
# Declare the contents of the .PHONY variable as phony. We keep that
-# information in a variable se we can use it in if_changed and friends.
+# information in a variable so we can use it in if_changed and friends.
.PHONY: $(PHONY)
diff --git a/init/Kconfig b/init/Kconfig
index f2f9b5362b4..7be4d383674 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -808,6 +808,14 @@ config KALLSYMS_EXTRA_PASS
you wait for kallsyms to be fixed.
+config STRIP_ASM_SYMS
+ bool "Strip assembler-generated symbols during link"
+ default n
+ help
+ Strip internal assembler-generated symbols during a link (symbols
+ that look like '.Lxxx') so they don't pollute the output of
+ get_wchan() and suchlike.
+
config HOTPLUG
bool "Support for hot-pluggable devices" if EMBEDDED
default y
diff --git a/scripts/Makefile.headersinst b/scripts/Makefile.headersinst
index 612dc13ddd8..095cfc8b9db 100644
--- a/scripts/Makefile.headersinst
+++ b/scripts/Makefile.headersinst
@@ -14,6 +14,8 @@ _dst := $(if $(dst),$(dst),$(obj))
kbuild-file := $(srctree)/$(obj)/Kbuild
include $(kbuild-file)
+_dst := $(if $(destination-y),$(destination-y),$(_dst))
+
include scripts/Kbuild.include
install := $(INSTALL_HDR_PATH)/$(_dst)
diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh
index 3eea8f15131..76af5f9623e 100644
--- a/scripts/gen_initramfs_list.sh
+++ b/scripts/gen_initramfs_list.sh
@@ -97,7 +97,7 @@ print_mtime() {
}
list_parse() {
- echo "$1 \\"
+ [ ! -L "$1" ] && echo "$1 \\" || :
}
# for each file print a line in following format
diff --git a/scripts/headerdep.pl b/scripts/headerdep.pl
index 97399da89ef..b7f6c560e24 100755
--- a/scripts/headerdep.pl
+++ b/scripts/headerdep.pl
@@ -19,7 +19,7 @@ my $opt_graph;
version => \&version,
all => \$opt_all,
- I => \@opt_include,
+ "I=s" => \@opt_include,
graph => \$opt_graph,
);
diff --git a/scripts/kconfig/kxgettext.c b/scripts/kconfig/kxgettext.c
index 6eb72a7f256..8d9ce22b0fc 100644
--- a/scripts/kconfig/kxgettext.c
+++ b/scripts/kconfig/kxgettext.c
@@ -43,6 +43,10 @@ static char *escape(const char* text, char *bf, int len)
++text;
goto next;
}
+ else if (*text == '\\') {
+ *bfp++ = '\\';
+ len--;
+ }
*bfp++ = *text++;
next:
--len;
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 8cc70612984..df6e6286a06 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1913,7 +1913,7 @@ static void read_dump(const char *fname, unsigned int kernel)
if (!mod) {
if (is_vmlinux(modname))
have_vmlinux = 1;
- mod = new_module(NOFAIL(strdup(modname)));
+ mod = new_module(modname);
mod->skip = 1;
}
s = sym_add_exported(symname, mod, export_no(export));
@@ -1997,7 +1997,7 @@ static void read_markers(const char *fname)
mod = find_module(modname);
if (!mod) {
- mod = new_module(NOFAIL(strdup(modname)));
+ mod = new_module(modname);
mod->skip = 1;
}
if (is_vmlinux(modname)) {
diff --git a/scripts/setlocalversion b/scripts/setlocalversion
index f1c4b35bc32..47e75b69a2e 100755
--- a/scripts/setlocalversion
+++ b/scripts/setlocalversion
@@ -21,7 +21,7 @@ if head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
# Is this git on svn?
if git config --get svn-remote.svn.url >/dev/null; then
- printf -- '-svn%s' "`git-svn find-rev $head`"
+ printf -- '-svn%s' "`git svn find-rev $head`"
fi
# Are there uncommitted changes?