Commit Graph

93 Commits

Author SHA1 Message Date
Martin Matuska
3f9d360c82 zfs: merge openzfs/zfs@14b43fbd9 (master) into main
Notable upstream pull request merges:
  #12271 Tinker with slop space accounting with dedup
  #12279 Fix ARC ghost states eviction accounting
  #12284 Add Module Parameter Regarding Log Size Limit
  #12300 Introduce dsl_dir_diduse_transfer_space()
  #12314 Optimize allocation throttling
  #12348 Minor ARC optimizations
  #12350 Detect HAVE_LARGE_STACKS at compile time
  #12356 Use SET_ERROR for more errors in FreeBSD vnops
  #12375 FreeBSD: Ignore make_dev_s() errors
  #12378 FreeBSD: Switch from MAXPHYS to maxphys on FreeBSD 13+

Obtained from:	OpenZFS
OpenZFS commit:	14b43fbd9c
2021-07-23 02:50:13 +02:00
Ed Maste
79e6eb5c01 zfs: Remove zfs-images submodule
This can cause issues like 'No url found for submodule path' in
downstream or derived projects making use of submodules.

Reviewed by:	imp
2021-07-19 16:40:09 -04:00
Konstantin Belousov
dbaad75f28 zfs: add missed dependency of zfs module on zlib
Reviewed by:	mm
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D31207
2021-07-18 01:44:22 +03:00
Martin Matuska
5eb61f6c65 zfs: merge openzfs/zfs@07a4c76e9 (master) into main
Notable upstream pull request merges:
  #12299 file reference counts can get corrupted
  #12320 FreeBSD: Use unmapped I/O for scattered/gang ABD buffers

Obtained from:	OpenZFS
OpenZFS commit:	07a4c76e90
2021-07-12 23:24:45 +02:00
Martin Matuska
7cd22ac434 zfs: merge openzfs/zfs@bdd11cbb9 (master) into main
Notable upstream pull request merges:
  #12274 Optimize txg_kick() process
  #12281 Move gethrtime() calls out of vdev queue lock
  #12287 Remove refcount from spa_config_*(
  #12289 Compact dbuf/buf hashes and lock arrays
  #12290 Remove avl_size field from struct avl_tree
  #12294 Upstream: dmu_zfetch_stream_fini leaks refcount
  #12295 Fix abd leak, kmem_free correct size of abd_t
  #12328 FreeBSD: Hardcode abd_chunk_size to PAGE_SIZE

Obtained from:	OpenZFS
OpenZFS commit:	bdd11cbb90
2021-07-07 23:31:52 +02:00
Martin Matuska
2617128a21 zfs: merge openzfs/zfs@4694131a0 (master) into main
Notable upstream pull request merges:
  #12253 module/zfs: simplify ddt_stat_add() loop
  #12288 Avoid 64bit division in multilist index functions

Obtained from:	OpenZFS
OpenZFS commit:	4694131a0a
2021-06-30 08:02:44 +02:00
Martin Matuska
33b8c039a9 zfs: merge openzfs/zfs@5e2c8338b (master) into main
Notable upstream pull request merges:
  #12183 Optimize small random numbers generation
  #12227 Revert Consolidate arc_buf allocation checks
  #12266 Fix flag copying in resume case
  #12273 zfs_metaslab_mem_limit should be 25 instead of 75
  #12276 Update cache file when setting compatibility property
  #12280 Help compiller optimize out abd_verify()
  #12282 FreeBSD: fix compilation of FreeBSD world after 29274c9f6

Obtained from:	OpenZFS
OpenZFS commit:	5e2c8338bf
2021-06-26 02:21:11 +02:00
Martin Matuska
0d8fe23735 zfs: merge openzfs/zfs@c4c162c1e (master) into main
Notable upstream pull request merges:
  #12054 Avoid deadlock when removing L2ARC devices under I/O
  #12172 Use wmsum for arc, abd, dbuf and zfetch statistics
  #12221 vdev_draid_min_asize() ignores reserved space

Obtained from:	OpenZFS
OpenZFS commit:	c4c162c1e8
2021-06-20 09:18:44 +02:00
Martin Matuska
3ff01b231d zfs: merge openzfs/zfs@afa7b3484 (master) into main
Notable upstream pull request merges:
  #12149: Multiple man-pages: Move to appropriate section
  #12158: Re-embed multilist_t storage
  #12191: Convert non-libzpool libraries to -fvisibility=hidden
  #12196: Unify manpage makefiles, move pages to better sexions, ...
  #12210: libzutil: import filtering optimisation
  #12212: Remove pool io kstats

Obtained from:	OpenZFS
OpenZFS commit:	afa7b34845
2021-06-13 04:38:47 +02:00
Martin Matuska
1603881667 zfs: merge openzfs/zfs@75b4cbf62 (master) into main
Notable upstream pull request merges:
  #11710 Allow zfs to send replication streams with missing snapshots
  #11751 Avoid taking global lock to destroy zfsdev state
  #11786 Ratelimit deadman zevents as with delay zevents
  #11803 ZFS traverse_visitbp optimization to limit prefetch
  #11813 Allow pool names that look like Solaris disk names
  #11822 Atomically check and set dropped zevent count
  #11822 Don't scale zfs_zevent_len_max by CPU count
  #11833 Refactor zfsdev state init/destroy to share common code
  #11837 zfs get -p only outputs 3 columns if "clones" property is empty
  #11843 libzutil: zfs_isnumber(): return false if input empty
  #11849 Use dsl_scan_setup_check() to setup a scrub
  #11861 Improvements to the 'compatibility' property
  #11862 cmd/zfs receive: allow dry-run (-n) to check property args
  #11864 receive: don't fail inheriting (-x) properties on wrong dataset type
  #11877 Combine zio caches if possible
  #11881 FreeBSD: use vnlru_free_vfsops if available
  #11883 FreeBSD: add support for lockless symlink lookup
  #11884 FreeBSD: add missing seqc write begin/end around zfs_acl_chown_setattr
  #11896 Fix crash in zio_done error reporting
  #11905 zfs-send(8): Restore sorting of flags
  #11926 FreeBSD: damage control racing .. lookups in face of mkdir/rmdir
  #11930 vdev_mirror: don't scrub/resilver devices that can't be read
  #11938 Fix AVX512BW Fletcher code on AVX512-but-not-BW machines
  #11955 zfs get: don't lookup mount options when using "-s local"
  #11956 libzfs: add keylocation=https://, backed by fetch(3) or libcurl
  #11959 vdev_id: variable not getting expanded under map_slot()
  #11966 Scale worker threads and taskqs with number of CPUs
  #11994 Clean up use of zfs_log_create in zfs_dir
  #11997 FreeBSD: Don't force xattr mount option
  #11997 FreeBSD: Implement xattr=sa
  #11997 FreeBSD: Use SET_ERROR to trace xattr name errors
  #11998 Simplify/fix dnode_move() for dn_zfetch
  #12003 FreeBSD: Initialize/destroy zp->z_lock
  #12010 Fix dRAID self-healing short columns
  #12033 Revert "Fix raw sends on encrypted datasets when copying back snapshots"
  #12040 Reinstate the old zpool read label logic as a fallback
  #12046 Improve scrub maxinflight_bytes math
  #12049 FreeBSD: avoid memory allocation in arc_prune_async
  #12052 FreeBSD: incorporate changes to the VFS_QUOTACTL(9) KPI
  #12061 Fix dRAID sequential resilver silent damage handling
  #12072 Let zfs diff be more permissive
  #12077 FreeBSD: Retry OCF ENOMEM errors.
  #12088 Propagate vdev state due to invalid label corruption
  #12091 libzfs: On FreeBSD, use MNT_NOWAIT with getfsstat
  #12097 FreeBSD: Update dataset_kstats for zvols in dev mode
  #12104 FreeBSD boot code reminder after zpool upgrade
  #12114 Introduce write-mostly sums

Obtained from:	OpenZFS
OpenZFS commit:	75b4cbf625
2021-06-08 16:52:44 +02:00
Martin Matuska
ed9215c8e0 zfs: merge openzfs/zfs@3522f57b6 (master) to main
This changes branch tracking of sys/contrib/openzfs to a new
direct-import branch vendor/openzfs/master.

No functional changes.

OpenZFS tag:	2.1.0-rc1
2021-06-08 16:25:14 +02:00
Jason A. Harmening
a4b07a2701 VFS_QUOTACTL(9): allow implementation to indicate busy state changes
Instead of requiring all implementations of vfs_quotactl to unbusy
the mount for Q_QUOTAON and Q_QUOTAOFF, add an "mp_busy" in/out param
to VFS_QUOTACTL(9).  The implementation may then indicate to the caller
whether it needed to unbusy the mount.

Also, add stbool.h to libprocstat modules which #define _KERNEL
before including sys/mount.h.  Otherwise they'll pull in sys/types.h
before defining _KERNEL and therefore won't have the bool definition
they need for mp_busy.

Reviewed By:	kib, markj
Differential Revision: https://reviews.freebsd.org/D30556
2021-05-30 14:53:47 -07:00
Jason A. Harmening
271fcf1c28 Revert commits 6d3e78ad6c and 54256e7954
Parts of libprocstat like to pretend they're kernel components for the
sake of including mount.h, and including sys/types.h in the _KERNEL
case doesn't fix the build for some reason.  Revert both the
VFS_QUOTACTL() change and the follow-up "fix" for now.
2021-05-29 17:48:02 -07:00
Jason A. Harmening
6d3e78ad6c VFS_QUOTACTL(9): allow implementation to indicate busy state changes
Instead of requiring all implementations of vfs_quotactl to unbusy
the mount for Q_QUOTAON and Q_QUOTAOFF, add an "mp_busy" in/out param
to VFS_QUOTACTL(9).  The implementation may then indicate to the caller
whether it needed to unbusy the mount.

Reviewed By:	kib, markj
Differential Revision: https://reviews.freebsd.org/D30218
2021-05-29 14:05:39 -07:00
Martin Matuska
9f1dc86c46 zfs: restore copyright disclaimer change from 4b84b4cca
The change will be pull-requested to upstream.

X-MFC-with:	4b84b4cca4
2021-04-26 22:16:50 +02:00
Martin Matuska
4b84b4cca4 zfs: fix non-functional mismerges from vendor/openzfs
- fix copyright in module/os/freebsd/spl/spl_acl.c
- fix mismerge in non-processed module/os/linux/zfs/zfs_uio.c

MFC after:      3 days
Obtained from:  OpenZFS
2021-04-26 03:05:13 +02:00
Mateusz Guzik
7ea3223c78 zfs: use vn_seqc_read_notmodify for racing .. lookups
Catching an in-flight unlocked vnode is fine here.

Reported by;	pho
2021-04-22 13:18:39 +00:00
Mateusz Guzik
9c651561a2 zfs: damage control racing .. lookups in face of mkdir/rmdir
Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D29769
2021-04-21 15:25:32 +00:00
Martin Matuska
6db169e920 zfs: merge openzfs/zfs@3522f57b6 (master)
Notable upstream pull request merges:
  #11742 When specifying raidz vdev name, parity count should match
  #11744 Use a helper function to clarify gang block size
  #11771 Support running FreeBSD buildworld on Arm-based macOS hosts

This is the last update that will be MFCed into stable/13.

From now on, the tracking of OpenZFS branches will be different:
- main continues tracking openzfs/zfs/master
- stable/13 is going to track openzfs/zfs/zfs-2.1-release

Obtained from:	OpenZFS
MFC after:	1 week
2021-04-14 12:51:51 +02:00
Mateusz Guzik
97ed4babb5 zfs: avoid memory allocation in arc_prune_async 2021-04-11 07:19:56 +02:00
Mateusz Guzik
feea35bed0 zfs: make vnlru_free_vfsops use conditional on version
Diff reduction against upstream.
2021-04-11 04:57:26 +00:00
Mateusz Guzik
a7fbfdee73 zfs: change format string in zio_fini to get rid of the cast 2021-04-10 20:33:43 +00:00
Jessica Clarke
3a314eb5bb zfs: Cherry-pick upstream commit ef977fce66 to fix macOS/arm64 bootstrap
Upstream commit message:

  Support running FreeBSD buildworld on Arm-based macOS hosts

  Arm-based Macs are like FreeBSD and provide a full 64-bit stat from the
  start, so have no stat64 variants. Thus, define stat64 and fstat64 as
  aliases for the normal versions.

  Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
  Signed-off-by: Jessica Clarke <jrtc27@jrtc27.com>
  Closes #11771

MFC after:	1 week
2021-03-27 02:23:59 +00:00
Martin Matuska
f9693bef8d zfs: merge OpenZFS master-891568c99
Notable upstream pull request merges:
  #11652 Split dmu_zfetch() speculation and execution parts
  #11682 Fix zfs_get_data access to files with wrong generation
  #11735 Clean up RAIDZ/DRAID ereport code
  #11737 Initialize metaslab range trees in metaslab_init
  #11739 FreeBSD: make seqc asserts conditional on replay
  #11763 Allow setting bootfs property on pools with indirect vdevs
  #11767 FreeBSD: Fix memory leaks in kstats

Obtained from:	OpenZFS
MFC after:	2 weeks
2021-03-21 02:17:59 +01:00
Mateusz Guzik
e9272225e6 vfs: fix vnlru marker handling for filtered/unfiltered cases
The global list has a marker with an invariant that free vnodes are
placed somewhere past that. A caller which performs filtering (like ZFS)
can move said marker all the way to the end, across free vnodes which
don't match. Then a caller which does not perform filtering will fail to
find them. This makes vn_alloc_hard sleep for 1 second instead of
reclaiming, resulting in significant stalls.

Fix the problem by requiring an explicit marker by callers which do
filtering.

As a temporary measure extend vnlru_free to restart if it fails to
reclaim anything.

Big thanks go to the reporter for testing several iterations of the
patch.

Reported by:	Yamagi <lists yamagi.org>
Tested by:	Yamagi <lists yamagi.org>
Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D29324
2021-03-18 14:59:03 +00:00
Martin Matuska
9db44a8e5d zfs: merge OpenZFS master-9305ff2ed
Notable upstream pull request merges:
  #11153 Scalable teardown lock for FreeBSD
  #11651 Don't bomb out when using keylocation=file://
  #11667 zvol: call zil_replaying() during replay
  #11683 abd_get_offset_struct() may allocate new abd
  #11693 Intentionally allow ZFS_READONLY in zfs_write
  #11716 zpool import cachefile improvements
  #11720 FreeBSD: Clean up zfsdev_close to match Linux
  #11730 FreeBSD: bring back possibility to rewind the
         checkpoint from bootloader

Obtained from:	OpenZFS
MFC after:	2 weeks
2021-03-14 02:32:14 +01:00
Mariusz Zaborski
653ed678c7 zfs: bring back possibility to rewind the checkpoint from
Add parsing of the rewind options.

When I was upstreaming the change [1], I omitted the part where we
detect that the pool should be rewind. When the FreeBSD repo has
synced with the OpenZFS, this part of the code was removed.

[1] FreeBSD repo: 277f38abff
[2] OpenZFS repo: f2c027bd6a

Originally reviewed by:		tsoome, allanjude
Originally reviewed by:		kevans (ok from high-level overview)

Signed-off-by: Mariusz Zaborski <oshogbo@vexillium.org>

PR:		254152
Reported by:	Zhenlei Huang <zlei.huang at gmail.com>
Obtained from:	https://github.com/openzfs/zfs/pull/11730
2021-03-13 12:56:17 +01:00
Mateusz Guzik
59146a6921 zfs: make seqc asserts conditional on replay
Avoids tripping on asserts when doing pool recovery.
2021-03-13 09:31:49 +00:00
Martin Matuska
caed7b1c39 zfs: merge OpenZFS master-bedbc13da
Notable upstream commits:
  8e43fa12c Fix vdev_rebuild_thread deadlock
  03ef8f09e Add missing checks for unsupported features
  2e160dee9 Fix assert in FreeBSD-specific dmu_read_pages
  bedbc13da Cancel TRIM / initialize on FAULTED non-writeable vdevs

MFC after:	1 week
Obtained from:	OpenZFS
2021-03-03 02:15:33 +01:00
Mateusz Guzik
1d8510c1a6 zfs: add missing seqc write begin/end around zfs_acl_chown_setattr
It happens to trip over an assert but does not matter for correctness at
this time. However, do it for future proofing.

Reported by:	avg
2021-02-27 22:29:50 +00:00
Martin Matuska
c170aa9f37 zfs: add missing checks for unsupported features
After the merge of OpenZFS master-9312e0fd1 it has become possible to
import ZFS pools witn an active org.illumos:edonr feature on FreeBSD,
leading to a panic.

In addition, "zpool status" reported all pools without edonr as upgradable
and "zpool upgrade -v" lists edonr in the list of upgradable features.

This is an accepted but not yet included bugfix by upstream.

Obtained from:		https://github.com/openzfs/zfs/pull/11653
Differential Revision:	https://reviews.freebsd.org/D28935
Reported by:		garga (on freebsd-current@)
Reviewed by:		freqlabs
X-MFC-with:		ba27dd8be8
2021-02-27 00:05:50 +01:00
Martin Matuska
ba27dd8be8 zfs: merge OpenZFS master-9312e0fd1
Notable upstream changes:
  778869fa1 Fix reporting of mount progress
  e7adccf7f Disable use of hardware crypto offload drivers on FreeBSD
  03e02e5b5 Fix checksum errors not being counted on repeated repair
  64e0fe14f Restore FreeBSD resource usage accounting
  11f2e9a49 Fix panic if scrubbing after removing a slog device

MFC after:	2 weeks
2021-02-22 13:01:17 +01:00
Martin Matuska
ee36e25a86 zfs: merge OpenZFS master-bf156c966
Notable upstream changes:
    bf156c966 Remove unused abd_alloc_scatter_offset_chunkcnt
    658fb8020 Add "compatibility" property for zpool feature sets

This update introduces a new pool property called "compatibility"
that can be used to enable a limited set of pool features on pool
creation and "stick" to it, so the "zpool upgrade" does not
accidentally enable features that are not desired. The value of
this property may then be changed later.

See zpool-features(5) for more information about the "compatibility"
pool property.

Obtained from:	OpenZFS
MFC after:	2 weeks
2021-02-18 15:19:35 +01:00
Martin Matuska
afcb3c4cb4 zfs: change file mode of all merged tests
If the ksh files are not executable then the tests are not run
and reported as failed.

MFC after:	2 weeks
X-MFC-with:	6b52139eb8
2021-02-16 12:23:43 +01:00
Martin Matuska
184c1b9439 zfs: merge OpenZFS master-436ab35a5
- speed up writing to ZFS pools without ZIL devices (aa755b3)
- speed up importing ZFS pools (2d8f72d, a0e0199, cf0977a)
...

MFC after:		2 weeks
Reviewed by:		mjg (partial)
Tested by:		pho
Differential Revision:	https://reviews.freebsd.org/D28677
2021-02-16 02:46:28 +01:00
Martin Matuska
5dce03847f zfs: Avoid updating the L2ARC device header unnecessarily
From openzfs-master 0ae184a6b commit message:
  If we do not write any buffers to the cache device and the evict hand
  has not advanced do not update the cache device header.

Cherry-picked from openzfs 0ae184a6ba
Patch Author:   George Amanakis <gamanakis@gmail.com>

MFC after:	        3 days
Reviewed by:            delphij
Differential Revision:  https://reviews.freebsd.org/D28682
2021-02-15 10:56:08 +01:00
Martin Matuska
f15e18a642 zfs: fix RAIDZ2/3 not healing parity with 2+ bad disks
From openzfs-master 62d4287f2 commit message:
  When scrubbing, (non-sequential) resilvering, or correcting a checksum
  error using RAIDZ parity, ZFS should heal any incorrect RAIDZ parity by
  overwriting it.  For example, if P disks are silently corrupted (P being
  the number of failures tolerated; e.g. RAIDZ2 has P=2), `zpool scrub`
  should detect and heal all the bad state on these disks, including
  parity.  This way if there is a subsequent failure we are fully
  protected.

  With RAIDZ2 or RAIDZ3, a block can have silent damage to a parity
  sector, and also damage (silent or known) to a data sector.  In this
  case the parity should be healed but it is not.

Cherry-picked from openzfs 62d4287f27
Patch Author:	Matthew Ahrens <matthew.ahrens@delphix.com>

MFC after:		3 days
Reviewed by:		delphij
Differential Revision:	https://reviews.freebsd.org/D28681
2021-02-15 10:50:10 +01:00
Antonio Russo
e9d419a053 Set file mode during zfs_write
Apply https://github.com/openzfs/zfs/pull/11576

Direct commit from upstream openzfs. Full commit message below:

Set file mode during zfs_write

3d40b65 refactored zfs_vnops.c, which shared much code verbatim between
Linux and BSD.  After a successful write, the suid/sgid bits are reset,
and the mode to be written is stored in newmode.  On Linux, this was
propagated to both the in-memory inode and znode, which is then updated
with sa_update.

3d40b65 accidentally removed the initialization of newmode, which
happened to occur on the same line as the inode update (which has been
moved out of the function).

The uninitialized newmode can be saved to disk, leading to a crash on
stat() of that file, in addition to a merely incorrect file mode.

Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Antonio Russo <aerusso@aerusso.net>
Closes #11474
Closes #11576

Obtained from:	openzfs/zfs@f8ce8aed0
MFC after:	0 days
Sponsored by:	iXsystems, Inc.
2021-02-09 12:30:06 -05:00
Mateusz Guzik
69c5fa5cd1 zfs: remove incomplete ifdefs for lockless symlink support
This wil be handled differently upstream and merged later.
2021-02-01 13:18:27 +01:00
Mateusz Guzik
7af02ef0b2 zfs: use atomic_load_consume_ptr for z_cached_symlink 2021-01-25 22:40:15 +00:00
Mateusz Guzik
cc96f92a57 atomic: make atomic_store_ptr type-aware 2021-01-25 22:40:15 +00:00
Mateusz Guzik
f40d6217f2 zfs: fix panics with invariant kernels from zfs_replay_setattr 2021-01-25 22:40:14 +00:00
Mateusz Guzik
3110d4ebd6 zfs: add support for lockless symlink lookup
Reviewed by:	kib (previous version)
Tested by:	pho (previous version)
Differential Revision:	https://reviews.freebsd.org/D27488
2021-01-23 15:04:43 +00:00
Alan Somers
58a08f9e99 [skip ci] Delete an accidentally-committed comment
MFC-With:	19cca0b961
2021-01-11 17:01:22 -07:00
Alan Somers
19cca0b961 aio: fix the tests when ZFS is not available
Don't try to cleanup the zpool if we couldn't create a zpool in the
first place.

Submitted by:	tmunro
MFC-with:	022ca2fc7f
2021-01-09 17:16:38 -07:00
Matt Macy
b363d3d52a OpenZFS: Fix issues caused by reversed commits + rebase 2021-01-07 17:42:10 -08:00
Matt Macy
7877fdebee OpenZFS merge main-gf11b09
- add dRAID support
- fix duplicate close handling
- fix memory leak in prefetch
- fix problem with SIMD benchmarking on FreeBSD boot
...
2021-01-07 16:55:59 -08:00
Thomas Munro
a5e284038e open(2): Add O_DSYNC flag.
POSIX O_DSYNC means that writes include an implicit fdatasync(2), just
as O_SYNC implies fsync(2).

VOP_WRITE() functions that understand the new IO_DATASYNC flag can act
accordingly, but we'll still pass down IO_SYNC so that file systems that
don't understand it will continue to provide the stronger O_SYNC
behaviour.

Flag also applies to fcntl(2).

Reviewed by: kib, delphij
Differential Revision: https://reviews.freebsd.org/D25090
2021-01-08 13:15:56 +13:00
Mateusz Guzik
82397d7919 vfs: denote vnode being a mount point with VIRF_MOUNTPOINT
Reviewed by:	kib (previous version)
Differential Revision:	https://reviews.freebsd.org/D27794
2021-01-03 06:50:06 +00:00
Ryan Libby
f2d48b5e2c Merge commit d8a09b3a0 from openzfs git (by Ryan Libby):
lua: avoid gcc -Wreturn-local-addr bug

  Avoid a bug with gcc's -Wreturn-local-addr warning with some
  obfuscation.  In buggy versions of gcc, if a return value is an
  expression that involves the address of a local variable, and even if
  that address is legally converted to a non-pointer type, a warning may
  be emitted and the value of the address may be replaced with zero.
  Howerver, buggy versions don't emit the warning or replace the value
  when simply returning a local variable of non-pointer type.

  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90737

  Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
  Signed-off-by: Ryan Libby <rlibby@FreeBSD.org>
  Closes #11337
2020-12-27 14:33:13 -08:00