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Extend CONFIG_DEBUG_LOCK_ALLOC check
The CONFIG_DEBUG_LOCK_ALLOC check at configure time was added to detect when mutex_lock() is defined as a GPL-only symbol. However, the check as written only inferred this from this configuration setting, it never actually checked. This change introduces that missing check to prevent false positives. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf
parent
c421831192
commit
e5b8562277
@ -311,34 +311,74 @@ dnl # Certain kernel build options are not supported. These must be
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dnl # detected at configure time and cause a build failure. Otherwise
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dnl # modules may be successfully built that behave incorrectly.
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dnl #
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dnl # CONFIG_PREEMPT - Preempt kernels require special handling.
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dnl #
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dnl # There are certain kernel build options which when enabled are
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dnl # completely incompatible with non GPL kernel modules. It is best
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dnl # to detect these at configure time and fail with a clear error
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dnl # rather than build everything and fail during linking.
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dnl #
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dnl # CONFIG_DEBUG_LOCK_ALLOC - Maps mutex_lock() to mutex_lock_nested()
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
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ZFS_LINUX_CONFIG([PREEMPT],
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AC_MSG_ERROR([
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*** Kernel built with CONFIG_PREEMPT which is not supported.
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*** You must rebuild your kernel without this option.]), [])
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AS_IF([test "$ZFS_META_LICENSE" = CDDL], [
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ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC],
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AC_MSG_ERROR([
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*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is
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*** incompatible with the CDDL license. You must rebuild
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*** your kernel without this option.]), [])
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])
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AS_IF([test "$ZFS_META_LICENSE" = GPL], [
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AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
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[Define to 1 if licensed under the GPL])
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])
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ZFS_AC_KERNEL_CONFIG_PREEMPT
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ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
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])
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dnl #
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dnl # Check CONFIG_PREEMPT
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dnl #
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dnl # Premptible kernels will be supported in the future. But at the
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dnl # moment there are a few places in the code which need to be updated
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dnl # to accomidate them. Until that work occurs we should detect this
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dnl # at configure time and fail with a sensible message. Otherwise,
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dnl # people will be able to build successfully, however they will have
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dnl # stability problems. See https://github.com/zfsonlinux/zfs/issues/83
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_CONFIG_PREEMPT], [
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ZFS_LINUX_CONFIG([PREEMPT],
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AC_MSG_ERROR([
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*** Kernel built with CONFIG_PREEMPT which is not supported.
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*** You must rebuild your kernel without this option.]), [])
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])
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dnl #
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dnl # Check CONFIG_DEBUG_LOCK_ALLOC
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dnl #
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dnl # This is typically only set for debug kernels because it comes with
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dnl # a performance penalty. However, when it is set it maps the non-GPL
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dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
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dnl # This will cause a failure at link time which we'd rather know about
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dnl # at compile time.
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dnl #
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dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
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dnl # with the upstream community we add a check to detect this case.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
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ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
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AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
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tmp_flags="$EXTRA_KCFLAGS"
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/module.h>
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#include <linux/mutex.h>
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MODULE_LICENSE("$ZFS_META_LICENSE");
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],[
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struct mutex lock;
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mutex_init(&lock);
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mutex_lock(&lock);
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mutex_unlock(&lock);
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],[
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AC_MSG_RESULT(no)
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],[
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AC_MSG_RESULT(yes)
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AC_MSG_ERROR([
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*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
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*** with the CDDL license. You must rebuild your kernel without
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*** this option enabled.])
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])
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EXTRA_KCFLAGS="$tmp_flags"
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], [])
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])
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dnl #
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226
configure
vendored
226
configure
vendored
@ -12396,6 +12396,19 @@ $as_echo "$SPL_SYMBOLS" >&6; }
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if test "$ZFS_META_LICENSE" = GPL; then
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_GPL_ONLY_SYMBOLS 1
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_ACEOF
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fi
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{ $as_echo "$as_me:$LINENO: checking whether Linux was built with CONFIG_PREEMPT" >&5
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$as_echo_n "checking whether Linux was built with CONFIG_PREEMPT... " >&6; }
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@ -12466,9 +12479,9 @@ fi
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if test "$ZFS_META_LICENSE" = CDDL; then
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{ $as_echo "$as_me:$LINENO: checking whether Linux was built with CONFIG_DEBUG_LOCK_ALLOC" >&5
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{ $as_echo "$as_me:$LINENO: checking whether Linux was built with CONFIG_DEBUG_LOCK_ALLOC" >&5
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$as_echo_n "checking whether Linux was built with CONFIG_DEBUG_LOCK_ALLOC... " >&6; }
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@ -12513,16 +12526,85 @@ _ACEOF
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{ $as_echo "$as_me:$LINENO: result: yes" >&5
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$as_echo "yes" >&6; }
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{ { $as_echo "$as_me:$LINENO: error:
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*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is
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*** incompatible with the CDDL license. You must rebuild
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*** your kernel without this option." >&5
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{ $as_echo "$as_me:$LINENO: checking whether mutex_lock() is GPL-only" >&5
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$as_echo_n "checking whether mutex_lock() is GPL-only... " >&6; }
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tmp_flags="$EXTRA_KCFLAGS"
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cat confdefs.h - <<_ACEOF >conftest.c
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <linux/module.h>
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#include <linux/mutex.h>
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MODULE_LICENSE("$ZFS_META_LICENSE");
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int
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main (void)
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{
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struct mutex lock;
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mutex_init(&lock);
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mutex_lock(&lock);
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mutex_unlock(&lock);
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;
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return 0;
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}
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_ACEOF
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rm -Rf build && mkdir -p build
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echo "obj-m := conftest.o" >build/Makefile
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if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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{ $as_echo "$as_me:$LINENO: result: no" >&5
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$as_echo "no" >&6; }
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else
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$as_echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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{ $as_echo "$as_me:$LINENO: result: yes" >&5
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$as_echo "yes" >&6; }
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{ { $as_echo "$as_me:$LINENO: error:
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*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
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*** with the CDDL license. You must rebuild your kernel without
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*** this option enabled." >&5
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$as_echo "$as_me: error:
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*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is
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*** incompatible with the CDDL license. You must rebuild
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*** your kernel without this option." >&2;}
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*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
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*** with the CDDL license. You must rebuild your kernel without
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*** this option enabled." >&2;}
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{ (exit 1); exit 1; }; }
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fi
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rm -Rf build
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EXTRA_KCFLAGS="$tmp_flags"
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else
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$as_echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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@ -12540,19 +12622,6 @@ fi
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fi
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if test "$ZFS_META_LICENSE" = GPL; then
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_GPL_ONLY_SYMBOLS 1
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_ACEOF
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fi
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{ $as_echo "$as_me:$LINENO: checking block device operation prototypes" >&5
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@ -18420,6 +18489,19 @@ $as_echo "$SPL_SYMBOLS" >&6; }
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if test "$ZFS_META_LICENSE" = GPL; then
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_GPL_ONLY_SYMBOLS 1
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_ACEOF
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fi
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{ $as_echo "$as_me:$LINENO: checking whether Linux was built with CONFIG_PREEMPT" >&5
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$as_echo_n "checking whether Linux was built with CONFIG_PREEMPT... " >&6; }
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@ -18490,9 +18572,9 @@ fi
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if test "$ZFS_META_LICENSE" = CDDL; then
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{ $as_echo "$as_me:$LINENO: checking whether Linux was built with CONFIG_DEBUG_LOCK_ALLOC" >&5
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{ $as_echo "$as_me:$LINENO: checking whether Linux was built with CONFIG_DEBUG_LOCK_ALLOC" >&5
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$as_echo_n "checking whether Linux was built with CONFIG_DEBUG_LOCK_ALLOC... " >&6; }
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@ -18537,16 +18619,85 @@ _ACEOF
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{ $as_echo "$as_me:$LINENO: result: yes" >&5
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$as_echo "yes" >&6; }
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{ { $as_echo "$as_me:$LINENO: error:
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*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is
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*** incompatible with the CDDL license. You must rebuild
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*** your kernel without this option." >&5
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{ $as_echo "$as_me:$LINENO: checking whether mutex_lock() is GPL-only" >&5
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$as_echo_n "checking whether mutex_lock() is GPL-only... " >&6; }
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tmp_flags="$EXTRA_KCFLAGS"
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cat confdefs.h - <<_ACEOF >conftest.c
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <linux/module.h>
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#include <linux/mutex.h>
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MODULE_LICENSE("$ZFS_META_LICENSE");
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int
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main (void)
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{
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struct mutex lock;
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mutex_init(&lock);
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mutex_lock(&lock);
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mutex_unlock(&lock);
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;
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return 0;
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}
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_ACEOF
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rm -Rf build && mkdir -p build
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echo "obj-m := conftest.o" >build/Makefile
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if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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{ $as_echo "$as_me:$LINENO: result: no" >&5
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$as_echo "no" >&6; }
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else
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$as_echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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{ $as_echo "$as_me:$LINENO: result: yes" >&5
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$as_echo "yes" >&6; }
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{ { $as_echo "$as_me:$LINENO: error:
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*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
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*** with the CDDL license. You must rebuild your kernel without
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*** this option enabled." >&5
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$as_echo "$as_me: error:
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*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is
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*** incompatible with the CDDL license. You must rebuild
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*** your kernel without this option." >&2;}
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*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
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*** with the CDDL license. You must rebuild your kernel without
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*** this option enabled." >&2;}
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{ (exit 1); exit 1; }; }
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fi
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rm -Rf build
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EXTRA_KCFLAGS="$tmp_flags"
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else
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$as_echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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@ -18564,19 +18715,6 @@ fi
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fi
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if test "$ZFS_META_LICENSE" = GPL; then
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_GPL_ONLY_SYMBOLS 1
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_ACEOF
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fi
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{ $as_echo "$as_me:$LINENO: checking block device operation prototypes" >&5
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