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depmod: pass -P $CONFIG_SYMBOL_PREFIX

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On architectures which have symbol prefixes, depmod emits lots of
warnings like this:

WARNING: $module.ko needs unknown symbol $symbol

This is because depmod isn't being passed the -P <symbol_prefix>
arguments to specify the symbol prefix to ignore. This option is
included since the 3.13 release of module-init-tools.

Update scripts/depmod.sh to take extra arguments for the symbol prefix
(required but may be empty), and update the main Makefile to always pass
"$(CONFIG_SYMBOL_PREFIX)" to scripts/depmod.sh.

If the provided symbol prefix is non-empty, scripts/depmod.sh checks if
depmod --version reports module-init-tools with a version number < 3.13
otherwise it appends -P $SYMBOL_PREFIX to the depmod command line.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: linux-kbuild@vger.kernel.org
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: uclinux-dist-devel@blackfin.uclinux.org
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
James Hogan 2013-02-06 12:56:59 +00:00 committed by Michal Marek
parent 9b58b9281d
commit 8937e89718
2 changed files with 24 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
Makefile
View file

@ -1396,7 +1396,7 @@ quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))
# Run depmod only if we have System.map and depmod is executable
quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
$(KERNELRELEASE)
$(KERNELRELEASE) "$(patsubst "%",%,$(CONFIG_SYMBOL_PREFIX))"
# Create temporary dir for module support files
# clean it up only when building all modules

26
scripts/depmod.sh
View file

@ -2,16 +2,36 @@
#
# A depmod wrapper used by the toplevel Makefile
if test $# -ne 2; then
echo "Usage: $0 /sbin/depmod <kernelrelease>" >&2
if test $# -ne 3; then
echo "Usage: $0 /sbin/depmod <kernelrelease> <symbolprefix>" >&2
exit 1
fi
DEPMOD=$1
KERNELRELEASE=$2
SYMBOL_PREFIX=$3
if ! test -r System.map -a -x "$DEPMOD"; then
exit 0
fi
# older versions of depmod don't support -P <symbol-prefix>
# support was added in module-init-tools 3.13
if test -n "$SYMBOL_PREFIX"; then
release=$("$DEPMOD" --version)
package=$(echo "$release" | cut -d' ' -f 1)
if test "$package" = "module-init-tools"; then
version=$(echo "$release" | cut -d' ' -f 2)
later=$(printf '%s\n' "$version" "3.13" | sort -V | tail -n 1)
if test "$later" != "$version"; then
# module-init-tools < 3.13, drop the symbol prefix
SYMBOL_PREFIX=""
fi
fi
if test -n "$SYMBOL_PREFIX"; then
SYMBOL_PREFIX="-P $SYMBOL_PREFIX"
fi
fi
# older versions of depmod require the version string to start with three
# numbers, so we cheat with a symlink here
depmod_hack_needed=true
@ -34,7 +54,7 @@ set -- -ae -F System.map
if test -n "$INSTALL_MOD_PATH"; then
set -- "$@" -b "$INSTALL_MOD_PATH"
fi
"$DEPMOD" "$@" "$KERNELRELEASE"
"$DEPMOD" "$@" "$KERNELRELEASE" $SYMBOL_PREFIX
ret=$?
if $depmod_hack_needed; then