]) # LIBCFS_IOV_ITER_HAS_TYPE
#
+# LIBCFS_HAVE_NS_TO_TIMESPEC64
+#
+# Kernel version 4.16-rc3 commit a84d1169164b274f13b97a23ff235c000efe3b49
+# introduced struct __kernel_old_timeval
+#
+AC_DEFUN([LIBCFS_HAVE_NS_TO_TIMESPEC64],[
+LB_CHECK_COMPILE([does 'ns_to_timespec64()' exist],
+kernel_old_timeval, [
+ #include <linux/time.h>
+],[
+ struct timespec64 kts;
+
+ kts = ns_to_timespec64(0);
+],[
+ AC_DEFINE(HAVE_NS_TO_TIMESPEC64, 1,
+ [ns_to_timespec64() is available])
+])
+]) # LIBCFS_HAVE_NS_TO_TIMESPEC64
+
+#
# Kernel version 3.17 changed hlist_add_after to
# hlist_add_behind
#
# introduced refcount_t which is atomic_t plus over flow guards.
#
AC_DEFUN([LIBCFS_REFCOUNT_T], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
LB_CHECK_LINUX_HEADER([linux/refcount.h], [
AC_DEFINE(HAVE_REFCOUNT_T, 1,
- [refcount_t is supported])])
+ [refcount_t is supported])
+])
+EXTRA_KCFLAGS="$tmp_flags"
]) # LIBCFS_REFCOUNT_T
#
+# Kernel version 4.12 commit 499118e966f1d2150bd66647c8932343c4e9a0b8
+# introduce memalloc_noreclaim_{save,restore}
+#
+AC_DEFUN([LIBCFS_MEMALLOC_NORECLAIM], [
+LB_CHECK_COMPILE([if memalloc_noreclaim_{save,restore} exist],
+memalloc_noreclaim, [
+ #include <linux/sched/mm.h>
+],[
+ int flag = memalloc_noreclaim_save();
+ memalloc_noreclaim_restore(flag);
+],[
+ AC_DEFINE(HAVE_MEMALLOC_RECLAIM, 1,
+ [memalloc_noreclaim_{save,restore}() is supported])
+])
+]) # LIBCFS_MEMALLOC_NORECLAIM
+
+#
# LIBCFS_SCHED_HEADERS
#
# 4.11 has broken up sched.h into more headers.
]) # LIBCFS_SCHED_HEADERS
#
+# Kernel version 4.11-rc1 commit 2c935bc57221cc2edc787c72ea0e2d30cdcd3d5e
+# introduce kref_read
+#
+AC_DEFUN([LIBCFS_KREF_READ], [
+LB_CHECK_COMPILE([if 'kref_read' exists],
+kref_read, [
+ #include <linux/kref.h>
+],[
+ kref_read(NULL);
+],[
+ AC_DEFINE(HAVE_KREF_READ, 1,
+ [kref_read() is available])
+])
+]) LIBCFS_KREF_READ
+
+#
# Kernel version 4.11-rc1 commit da20420f83ea0fbcf3d03afda08d971ea1d8a356
# introduced rht_bucket_var
#
cpus_read_lock();
cpus_read_unlock();
],[
- AC_DEFINE(HAVE_CPUS_READ_LOCK, 1, ['cpu_read_lock' exist])
+ AC_DEFINE(HAVE_CPUS_READ_LOCK, 1, ['cpus_read_lock' exist])
])
]) # LIBCFS_CPUS_READ_LOCK
# introduce processor.h
#
AC_DEFUN([LIBCFS_HAVE_PROCESSOR_HEADER], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
LB_CHECK_LINUX_HEADER([linux/processor.h], [
AC_DEFINE(HAVE_PROCESSOR_H, 1,
- [processor.h is present])])
+ [processor.h is present])
+])
+EXTRA_KCFLAGS="$tmp_flags"
]) # LIBCFS_HAVE_PROCESSOR_HEADER
#
]) # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
#
+# LIBCFS_LOCKDEP_IS_HELD
+#
+# Kernel v4.15-rc8-106-g08f36ff64234
+# lockdep: Make lockdep checking constant
+#
+AC_DEFUN([LIBCFS_LOCKDEP_IS_HELD], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if 'lockdep_is_held()' uses const argument],
+lockdep_is_held, [
+ #include <linux/lockdep.h>
+],[
+#ifdef CONFIG_LOCKDEP
+ const struct spinlock *lock = NULL;
+
+ lockdep_is_held(lock);
+#endif
+],[],[
+ AC_DEFINE(NEED_LOCKDEP_IS_HELD_DISCARD_CONST, 1,
+ [lockdep_is_held() argument is const])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LIBCFS_LOCKDEP_IS_HELD
+
+#
# LIBCFS_TIMER_SETUP
#
# Kernel version 4.15 commit e99e88a9d2b067465adaa9c111ada99a041bef9a
]) # LIBCFS_WAIT_VAR_EVENT
#
+# LIBCFS_BITMAP_ALLOC
+#
+# Kernel version 4.17 commit c42b65e363ce97a828f81b59033c3558f8fa7f70
+# added bitmap memory allocation handling.
+#
+AC_DEFUN([LIBCFS_BITMAP_ALLOC], [
+LB_CHECK_COMPILE([if Linux bitmap memory management exist],
+bitmap_alloc, [
+ #include <linux/bitmap.h>
+],[
+ unsigned long *map = bitmap_alloc(1, GFP_KERNEL);
+],[
+ AC_DEFINE(HAVE_BITMAP_ALLOC, 1,
+ [Linux bitmap can be allocated])
+])
+]) # LIBCFS_BITMAP_ALLOC
+
+#
# LIBCFS_CLEAR_AND_WAKE_UP_BIT
#
# Kernel version 4.17-rc2 commit 8236b0ae31c837d2b3a2565c5f8d77f637e824cc
]) # LIBCFS_CLEAR_AND_WAKE_UP_BIT
#
+# LIBCFS_XARRAY_SUPPORT
+#
+# 4.19-rc5 kernel commit 3159f943aafdbacb2f94c38fdaadabf2bbde2a14
+# replaced the radix tree implementation with Xarrays. This change
+# introduced functionaly needed for general Xarray support
+#
+AC_DEFUN([LIBCFS_XARRAY_SUPPORT], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if page cache uses Xarray],
+xarray_support, [
+ #include <linux/xarray.h>
+],[
+ xa_is_value(NULL);
+],[
+ AC_DEFINE(HAVE_XARRAY_SUPPORT, 1,
+ [kernel Xarray implementation lacks 'xa_is_value'])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LIBCFS_XARRAY_SUPPORT
+
+#
# LIBCFS_HAVE_IOV_ITER_TYPE
#
# kernel 4.20 commit 00e23707442a75b404392cef1405ab4fd498de6b
])])
]) # LIBCFS_CONFIG_CRYPTO_CRC32
+AC_DEFUN([LIBCFS_PROG_LINUX_SRC], [] )
+AC_DEFUN([LIBCFS_PROG_LINUX_RESULTS], [])
#
# LIBCFS_PROG_LINUX
LIBCFS_SHRINKER_COUNT
# 3.15
LIBCFS_IOV_ITER_HAS_TYPE
+# 3.16
+LIBCFS_HAVE_NS_TO_TIMESPEC64
# 3.17
LIBCFS_HLIST_ADD_AFTER
LIBCFS_TIMESPEC64
# 4.11
LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
LIBCFS_SCHED_HEADERS
+LIBCFS_KREF_READ
LIBCFS_RHT_BUCKET_VAR
# 4.12
LIBCFS_HAVE_PROCESSOR_HEADER
LIBCFS_HAVE_WAIT_BIT_HEADER
+LIBCFS_MEMALLOC_NORECLAIM
LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
LIBCFS_CPUS_READ_LOCK
LIBCFS_UUID_T
LIBCFS_NEW_KERNEL_READ
LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
# 4.15
+LIBCFS_LOCKDEP_IS_HELD
LIBCFS_TIMER_SETUP
# 4.16
LIBCFS_WAIT_VAR_EVENT
# 4.17
+LIBCFS_BITMAP_ALLOC
LIBCFS_CLEAR_AND_WAKE_UP_BIT
+# 4.19
+LIBCFS_XARRAY_SUPPORT
# 4.20
LIBCFS_HAVE_IOV_ITER_TYPE
# 5.0
libcfs/autoconf/Makefile
libcfs/include/Makefile
libcfs/include/libcfs/Makefile
+libcfs/include/uapi/Makefile
libcfs/include/libcfs/linux/Makefile
libcfs/include/libcfs/util/Makefile
+libcfs/include/libcfs/crypto/Makefile
+libcfs/include/uapi/linux/Makefile
libcfs/libcfs/Makefile
libcfs/libcfs/autoMakefile
libcfs/libcfs/linux/Makefile
libcfs/libcfs/util/Makefile
+libcfs/libcfs/crypto/Makefile
])
]) # LIBCFS_CONFIG_FILES