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SLES10 Fixes (part 3):

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- Configure check for mutex_lock_nested().  This function was introduced
  as part of the mutex validator in 2.6.18, but if it's unavailable then
  it's safe to fallback to a plain mutex_lock().
This commit is contained in:
Brian Behlendorf
2009-05-20 10:56:13 -07:00
parent 96dded3844
commit 6c9433c150
6 changed files with 107 additions and 0 deletions
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configure
Vendored
+67
View File
@@ -20510,6 +20510,73 @@ fi
echo "$as_me:$LINENO: checking whether mutex_lock_nested() is available" >&5
echo $ECHO_N "checking whether mutex_lock_nested() is available... $ECHO_C" >&6
cat >conftest.c <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
#include <linux/mutex.h>
int
main (void)
{
struct mutex mutex;
mutex_init(&mutex);
mutex_lock_nested(&mutex, 0);
;
return 0;
}
_ACEOF
rm -Rf build && mkdir -p build
echo "obj-m := conftest.o" >build/Makefile
if { ac_try='cp conftest.c build && make modules LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
echo "$as_me:$LINENO: result: yes" >&5
echo "${ECHO_T}yes" >&6
cat >>confdefs.h <<\_ACEOF
#define HAVE_MUTEX_LOCK_NESTED 1
_ACEOF
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6
fi
rm -Rf build
echo "$as_me:$LINENO: checking whether symbol div64_64 is exported" >&5
echo $ECHO_N "checking whether symbol div64_64 is exported... $ECHO_C" >&6
grep -q -E '[[:space:]]div64_64[[:space:]]' $LINUX_OBJ/Module.symvers 2>/dev/null