linux-next: build failure after merge of the bcachefs tree

From: Stephen Rothwell
Date: Mon Sep 11 2023 - 22:39:54 EST

Next message: Prashant Malani: "Re: [PATCH v3 3/4] platform/chrome: cros_ec_typec: Add Displayport Alternatemode 2.1 Support"
Previous message: kernel test robot: "Re: [PATCH 7/7] riscv: mm: Combine the SMP and non-SMP TLB flushing code"
Next in thread: Qi Zheng: "Re: linux-next: build failure after merge of the bcachefs tree"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Hi all,

After merging the bcachefs tree, today's linux-next build (x86_64
allmodconfig) failed like this:

fs/bcachefs/btree_cache.c: In function 'bch2_fs_btree_cache_exit':
fs/bcachefs/btree_cache.c:403:9: error: implicit declaration of function 'unregister_shrinker'; did you mean 'unregister_chrdev'? [-Werror=implicit-function-declaration]
403 | unregister_shrinker(&bc->shrink);
| ^~~~~~~~~~~~~~~~~~~
| unregister_chrdev
fs/bcachefs/btree_cache.c: In function 'bch2_fs_btree_cache_init':
fs/bcachefs/btree_cache.c:479:15: error: implicit declaration of function 'register_shrinker'; did you mean 'register_chrdev'? [-Werror=implicit-function-declaration]
479 | ret = register_shrinker(&bc->shrink, "%s/btree_cache", c->name);
| ^~~~~~~~~~~~~~~~~
| register_chrdev
cc1: all warnings being treated as errors

Caused by commits

5ec30115c066 ("bcachefs: Initial commit")

interacting with commit

eba045d9350d ("mm: shrinker: remove old APIs")

from v6.6-rc1.

I have applied the following merge resolution patch for today. More may
be needed.

From 801ad185700d9a7abcf156233b9db6cf6d831581 Mon Sep 17 00:00:00 2001
From: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Date: Tue, 12 Sep 2023 11:27:22 +1000
Subject: [PATCH] bcachefs: convert to dynamically allocated shrinkers

Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
---
fs/bcachefs/btree_cache.c | 19 +++++++++++--------
fs/bcachefs/btree_key_cache.c | 18 +++++++++++-------
fs/bcachefs/btree_types.h | 4 ++--
fs/bcachefs/fs.c | 2 +-
fs/bcachefs/sysfs.c | 2 +-
5 files changed, 26 insertions(+), 19 deletions(-)

diff --git a/fs/bcachefs/btree_cache.c b/fs/bcachefs/btree_cache.c
index 245ddd92b2d1..7f0eded6c296 100644
--- a/fs/bcachefs/btree_cache.c
+++ b/fs/bcachefs/btree_cache.c
@@ -285,7 +285,7 @@ static int btree_node_write_and_reclaim(struct bch_fs *c, struct btree *b)
static unsigned long bch2_btree_cache_scan(struct shrinker *shrink,
struct shrink_control *sc)
{
- struct bch_fs *c = container_of(shrink, struct bch_fs,
+ struct bch_fs *c = container_of(&shrink, struct bch_fs,
btree_cache.shrink);
struct btree_cache *bc = &c->btree_cache;
struct btree *b, *t;
@@ -384,7 +384,7 @@ static unsigned long bch2_btree_cache_scan(struct shrinker *shrink,
static unsigned long bch2_btree_cache_count(struct shrinker *shrink,
struct shrink_control *sc)
{
- struct bch_fs *c = container_of(shrink, struct bch_fs,
+ struct bch_fs *c = container_of(&shrink, struct bch_fs,
btree_cache.shrink);
struct btree_cache *bc = &c->btree_cache;

@@ -400,7 +400,7 @@ void bch2_fs_btree_cache_exit(struct bch_fs *c)
struct btree *b;
unsigned i, flags;

- unregister_shrinker(&bc->shrink);
+ shrinker_free(bc->shrink);

/* vfree() can allocate memory: */
flags = memalloc_nofs_save();
@@ -454,6 +454,7 @@ void bch2_fs_btree_cache_exit(struct bch_fs *c)
int bch2_fs_btree_cache_init(struct bch_fs *c)
{
struct btree_cache *bc = &c->btree_cache;
+ struct shrinker *shrink;
unsigned i;
int ret = 0;

@@ -473,12 +474,14 @@ int bch2_fs_btree_cache_init(struct bch_fs *c)

mutex_init(&c->verify_lock);

- bc->shrink.count_objects = bch2_btree_cache_count;
- bc->shrink.scan_objects = bch2_btree_cache_scan;
- bc->shrink.seeks = 4;
- ret = register_shrinker(&bc->shrink, "%s/btree_cache", c->name);
- if (ret)
+ shrink = shrinker_alloc(0, "%s/btree_cache", c->name);
+ if (!shrink)
goto err;
+ bc->shrink = shrink;
+ shrink->count_objects = bch2_btree_cache_count;
+ shrink->scan_objects = bch2_btree_cache_scan;
+ shrink->seeks = 4;
+ shrinker_register(shrink);

return 0;
err:
diff --git a/fs/bcachefs/btree_key_cache.c b/fs/bcachefs/btree_key_cache.c
index 505e7c365ab7..88d33690233b 100644
--- a/fs/bcachefs/btree_key_cache.c
+++ b/fs/bcachefs/btree_key_cache.c
@@ -838,7 +838,7 @@ void bch2_btree_key_cache_drop(struct btree_trans *trans,
static unsigned long bch2_btree_key_cache_scan(struct shrinker *shrink,
struct shrink_control *sc)
{
- struct bch_fs *c = container_of(shrink, struct bch_fs,
+ struct bch_fs *c = container_of(&shrink, struct bch_fs,
btree_key_cache.shrink);
struct btree_key_cache *bc = &c->btree_key_cache;
struct bucket_table *tbl;
@@ -936,7 +936,7 @@ static unsigned long bch2_btree_key_cache_scan(struct shrinker *shrink,
static unsigned long bch2_btree_key_cache_count(struct shrinker *shrink,
struct shrink_control *sc)
{
- struct bch_fs *c = container_of(shrink, struct bch_fs,
+ struct bch_fs *c = container_of(&shrink, struct bch_fs,
btree_key_cache.shrink);
struct btree_key_cache *bc = &c->btree_key_cache;
long nr = atomic_long_read(&bc->nr_keys) -
@@ -957,7 +957,7 @@ void bch2_fs_btree_key_cache_exit(struct btree_key_cache *bc)
int cpu;
#endif

- unregister_shrinker(&bc->shrink);
+ shrinker_free(bc->shrink);

mutex_lock(&bc->lock);

@@ -1031,6 +1031,7 @@ void bch2_fs_btree_key_cache_init_early(struct btree_key_cache *c)
int bch2_fs_btree_key_cache_init(struct btree_key_cache *bc)
{
struct bch_fs *c = container_of(bc, struct bch_fs, btree_key_cache);
+ struct shrinker *shrink;

#ifdef __KERNEL__
bc->pcpu_freed = alloc_percpu(struct btree_key_cache_freelist);
@@ -1043,11 +1044,14 @@ int bch2_fs_btree_key_cache_init(struct btree_key_cache *bc)

bc->table_init_done = true;

- bc->shrink.seeks = 0;
- bc->shrink.count_objects = bch2_btree_key_cache_count;
- bc->shrink.scan_objects = bch2_btree_key_cache_scan;
- if (register_shrinker(&bc->shrink, "%s/btree_key_cache", c->name))
+ shrink = shrinker_alloc(0, "%s/btree_key_cache", c->name);
+ if (!shrink)
return -BCH_ERR_ENOMEM_fs_btree_cache_init;
+ bc->shrink = shrink;
+ shrink->seeks = 0;
+ shrink->count_objects = bch2_btree_key_cache_count;
+ shrink->scan_objects = bch2_btree_key_cache_scan;
+ shrinker_register(shrink);
return 0;
}

diff --git a/fs/bcachefs/btree_types.h b/fs/bcachefs/btree_types.h
index 70398aaa095e..fac0abdaf167 100644
--- a/fs/bcachefs/btree_types.h
+++ b/fs/bcachefs/btree_types.h
@@ -163,7 +163,7 @@ struct btree_cache {
unsigned used;
unsigned reserve;
atomic_t dirty;
- struct shrinker shrink;
+ struct shrinker *shrink;

/*
* If we need to allocate memory for a new btree node and that
@@ -321,7 +321,7 @@ struct btree_key_cache {
bool table_init_done;
struct list_head freed_pcpu;
struct list_head freed_nonpcpu;
- struct shrinker shrink;
+ struct shrinker *shrink;
unsigned shrink_iter;
struct btree_key_cache_freelist __percpu *pcpu_freed;

diff --git a/fs/bcachefs/fs.c b/fs/bcachefs/fs.c
index 48431700b83e..bdc8573631bd 100644
--- a/fs/bcachefs/fs.c
+++ b/fs/bcachefs/fs.c
@@ -1885,7 +1885,7 @@ static struct dentry *bch2_mount(struct file_system_type *fs_type,
sb->s_flags |= SB_POSIXACL;
#endif

- sb->s_shrink.seeks = 0;
+ sb->s_shrink->seeks = 0;

vinode = bch2_vfs_inode_get(c, BCACHEFS_ROOT_SUBVOL_INUM);
ret = PTR_ERR_OR_ZERO(vinode);
diff --git a/fs/bcachefs/sysfs.c b/fs/bcachefs/sysfs.c
index 41c6900c34c1..a9f480c26bb4 100644
--- a/fs/bcachefs/sysfs.c
+++ b/fs/bcachefs/sysfs.c
@@ -522,7 +522,7 @@ STORE(bch2_fs)

sc.gfp_mask = GFP_KERNEL;
sc.nr_to_scan = strtoul_or_return(buf);
- c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
+ c->btree_cache.shrink->scan_objects(c->btree_cache.shrink, &sc);
}

if (attr == &sysfs_btree_wakeup)
--
2.40.1

--
Cheers,
Stephen Rothwell

Attachment: pgpunc2a65zqI.pgp
Description: OpenPGP digital signature

Next message: Prashant Malani: "Re: [PATCH v3 3/4] platform/chrome: cros_ec_typec: Add Displayport Alternatemode 2.1 Support"
Previous message: kernel test robot: "Re: [PATCH 7/7] riscv: mm: Combine the SMP and non-SMP TLB flushing code"
Next in thread: Qi Zheng: "Re: linux-next: build failure after merge of the bcachefs tree"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]