lkml.org 
[lkml]   [2013]   [Feb]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 1/1] depmod: pass -P $CONFIG_SYMBOL_PREFIX
Date
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
---
changes since v1: clean up with assistance from Mike Frysinger (thanks!)
* always pass prefix to depmod.sh to simplify the logic
* use printf instead of ugly echos in version check

Makefile | 2 +-
scripts/depmod.sh | 26 +++++++++++++++++++++++---
2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index 54dfde5..6cb7fdb 100644
--- a/Makefile
+++ b/Makefile
@@ -1397,7 +1397,7 @@ 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
diff --git a/scripts/depmod.sh b/scripts/depmod.sh
index 2ae4817..122599b 100755
--- a/scripts/depmod.sh
+++ b/scripts/depmod.sh
@@ -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
--
1.7.7.6



\
 
 \ /
  Last update: 2013-02-06 14:42    [W:0.048 / U:0.100 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site