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Brian Behlendorf bff2361aeb
Linux 5.2 compat: rw_tryupgrade() 
Commit torvalds/linux@46ad0840b has removed the architecture specific
rwsem source and headers leaving only the generic version.  As part
of this change the RWSEM_ACTIVE_READ_BIAS and RWSEM_ACTIVE_WRITE_BIAS
macros were moved to the private kernel/locking/rwsem.h header.
This results in a build failure because these macros were required
to implement the rw_tryupgrade() compatibility function.

In practice, this isn't a major problem because there are only a
few consumers of rw_tryupgrade() and because consumers of rw_tryupgrade
should be written to retry using rw_enter(RW_WRITER).

After auditing all of the callers only dmu_zfetch() was determined
not to perform a retry.  It has been updated in this commit to
resolve this issue.

That said, the rw_tryupgrade() functionality should be considered
for possible removal in a future release due to the difficultly
in supporting the interface.

Reviewed-by: Tomohiro Kusumi <kusumi.tomohiro@gmail.com>
Reviewed-by: Chunwei Chen <tuxoko@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #8730
 		2019-05-23 13:46:33 -07:00
..
Makefile.am Add TRIM support 2019-03-29 09:13:20 -07:00
acl.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
atomic.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
byteorder.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
callb.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
callo.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
cmn_err.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
condvar.h Linux 4.18 compat: inode timespec -> timespec64 2018-06-19 21:51:18 -07:00
console.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
cred.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
ctype.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
debug.h Restrict kstats and print real pointers 2019-04-04 18:57:06 -07:00
disp.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
dkio.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
errno.h Update build system and packaging 2018-05-29 16:00:33 -07:00
fcntl.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
file.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
inttypes.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
isa_defs.h Fix kernel unaligned access on sparc64 2018-07-11 13:10:40 -07:00
kmem.h OpenZFS 9284 - arc_reclaim_thread has 2 jobs 2018-12-26 13:22:28 -08:00
kmem_cache.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
kobj.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
kstat.h Restrict kstats and print real pointers 2019-04-04 18:57:06 -07:00
list.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
mode.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
mutex.h Update build system and packaging 2018-05-29 16:00:33 -07:00
param.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
proc.h Unbreak build on Linux kernel < 3.10 2019-04-08 14:59:24 -07:00
processor.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
procfs_list.h Restrict kstats and print real pointers 2019-04-04 18:57:06 -07:00
random.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
rwlock.h Linux 5.2 compat: rw_tryupgrade() 2019-05-23 13:46:33 -07:00
shrinker.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
sid.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
signal.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
stat.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
strings.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
sunddi.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
sysmacros.h Create /proc/sys/kernel/spl/gitrev with git hash 2018-10-08 21:57:02 -07:00
systeminfo.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
taskq.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
thread.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
time.h Linux 4.18 compat: Use ktime_get_coarse_real_ts64() 2019-01-28 10:11:03 -08:00
timer.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
tsd.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
types.h Linux 5.1 compat: Drop ULLONG_MAX and LLONG_MAX definitions 2019-05-07 09:55:40 -07:00
types32.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
uio.h deadlock between mm_sem and tx assign in zfs_write() and page fault 2018-10-16 11:11:24 -07:00
user.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
vfs.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
vmem.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
vmsystm.h Linux 5.0 compat: Use totalhigh_pages() 2019-05-04 16:40:48 -07:00
vnode.h ZFS Reads may result in unneccesary calls to zil_commit 2019-03-22 13:09:11 -07:00
wait.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
zmod.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
zone.h Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00