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dmu_buf_will_clone: change assertion to fix 32-bit compiler warning 

Building module/zfs/dbuf.c for 32-bit targets can result in a warning:

In file included from
/usr/src/sys/contrib/openzfs/include/sys/zfs_context.h:97,
                 from /usr/src/sys/contrib/openzfs/module/zfs/dbuf.c:32:
/usr/src/sys/contrib/openzfs/module/zfs/dbuf.c: In function
'dmu_buf_will_clone':
/usr/src/sys/contrib/openzfs/lib/libspl/include/assert.h:116:33: error:
cast from pointer to integer of different size
[-Werror=pointer-to-int-cast]
  116 |         const uint64_t __left = (uint64_t)(LEFT);
  \
      |                                 ^
/usr/src/sys/contrib/openzfs/lib/libspl/include/assert.h:148:25: note:
in expansion of macro 'VERIFY0'
  148 | #define ASSERT0         VERIFY0
      |                         ^~~~~~~
/usr/src/sys/contrib/openzfs/module/zfs/dbuf.c:2704:9: note: in
expansion of macro 'ASSERT0'
 2704 |         ASSERT0(dbuf_find_dirty_eq(db, tx->tx_txg));
      |         ^~~~~~~

This is because dbuf_find_dirty_eq() returns a pointer, which if
pointers are 32-bit results in a warning about the cast to uint64_t.

Instead, use the ASSERT3P() macro, with == and NULL as second and third
arguments, which should work regardless of the target's bitness.

Reviewed-by: Kay Pedersen <mail@mkwg.de>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Dimitry Andric <dimitry@andric.com>
Closes #15224
This commit is contained in:
Dimitry Andric 2023-09-01 03:17:12 +02:00 committed by GitHub
parent cad00d5180
commit 010c003e5f
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1 changed files with 1 additions and 1 deletions
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module/zfs/dbuf.c
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@ -2701,7 +2701,7 @@ dmu_buf_will_clone(dmu_buf_t *db_fake, dmu_tx_t *tx)
*/
mutex_enter(&db->db_mtx);
VERIFY(!dbuf_undirty(db, tx));
ASSERT0(dbuf_find_dirty_eq(db, tx->tx_txg));
ASSERT3P(dbuf_find_dirty_eq(db, tx->tx_txg), ==, NULL);
if (db->db_buf != NULL) {
arc_buf_destroy(db->db_buf, db);
db->db_buf = NULL;