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linux 6.7 compat: handle superblock shrinker member change

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In 6.7 the superblock shrinker member s_shrink has changed from being an
embedded struct to a pointer. Detect this, and don't take a reference if
it already is one.

Signed-off-by: Rob Norris <robn@despairlabs.com>
Sponsored-by: https://github.com/sponsors/robn
This commit is contained in:
Rob Norris
2023-12-16 17:39:07 +11:00
committed by Brian Behlendorf
parent 3c13601a12
commit 18a9185165
2 changed files with 42 additions and 3 deletions
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module/os/linux/zfs/zfs_vfsops.c
+8 -2
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@@ -1240,12 +1240,18 @@ zfs_prune_aliases(zfsvfs_t *zfsvfs, unsigned long nr_to_scan)
* and inode caches. This can occur when the ARC needs to free meta data
* blocks but can't because they are all pinned by entries in these caches.
*/
#if defined(HAVE_SUPER_BLOCK_S_SHRINK)
#define S_SHRINK(sb) (&(sb)->s_shrink)
#elif defined(HAVE_SUPER_BLOCK_S_SHRINK_PTR)
#define S_SHRINK(sb) ((sb)->s_shrink)
#endif
int
zfs_prune(struct super_block *sb, unsigned long nr_to_scan, int *objects)
{
zfsvfs_t *zfsvfs = sb->s_fs_info;
int error = 0;
struct shrinker *shrinker = &sb->s_shrink;
struct shrinker *shrinker = S_SHRINK(sb);
struct shrink_control sc = {
.nr_to_scan = nr_to_scan,
.gfp_mask = GFP_KERNEL,
@@ -1257,7 +1263,7 @@ zfs_prune(struct super_block *sb, unsigned long nr_to_scan, int *objects)
#if defined(HAVE_SPLIT_SHRINKER_CALLBACK) && \
defined(SHRINK_CONTROL_HAS_NID) && \
defined(SHRINKER_NUMA_AWARE)
if (sb->s_shrink.flags & SHRINKER_NUMA_AWARE) {
if (shrinker->flags & SHRINKER_NUMA_AWARE) {
*objects = 0;
for_each_online_node(sc.nid) {
*objects += (*shrinker->scan_objects)(shrinker, &sc);