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lib: percpu_counter_init error handling

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alloc_percpu can fail, propagate that error.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Peter Zijlstra 2007-10-16 23:25:45 -07:00 committed by Linus Torvalds
parent bf1d89c813
commit 833f4077bf
5 changed files with 52 additions and 18 deletions
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15
fs/ext2/super.c
View file

@ -653,6 +653,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
int db_count;
int i, j;
__le32 features;
int err;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
@ -906,12 +907,20 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
get_random_bytes(&sbi->s_next_generation, sizeof(u32));
spin_lock_init(&sbi->s_next_gen_lock);
percpu_counter_init(&sbi->s_freeblocks_counter,
err = percpu_counter_init(&sbi->s_freeblocks_counter,
ext2_count_free_blocks(sb));
percpu_counter_init(&sbi->s_freeinodes_counter,
if (!err) {
err = percpu_counter_init(&sbi->s_freeinodes_counter,
ext2_count_free_inodes(sb));
percpu_counter_init(&sbi->s_dirs_counter,
}
if (!err) {
err = percpu_counter_init(&sbi->s_dirs_counter,
ext2_count_dirs(sb));
}
if (err) {
printk(KERN_ERR "EXT2-fs: insufficient memory\n");
goto failed_mount3;
}
/*
* set up enough so that it can read an inode
*/

21
fs/ext3/super.c
View file

@ -1416,6 +1416,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
int i;
int needs_recovery;
__le32 features;
int err;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
@ -1675,12 +1676,20 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
get_random_bytes(&sbi->s_next_generation, sizeof(u32));
spin_lock_init(&sbi->s_next_gen_lock);
percpu_counter_init(&sbi->s_freeblocks_counter,
ext3_count_free_blocks(sb));
percpu_counter_init(&sbi->s_freeinodes_counter,
ext3_count_free_inodes(sb));
percpu_counter_init(&sbi->s_dirs_counter,
ext3_count_dirs(sb));
err = percpu_counter_init(&sbi->s_freeblocks_counter,
ext3_count_free_blocks(sb));
if (!err) {
err = percpu_counter_init(&sbi->s_freeinodes_counter,
ext3_count_free_inodes(sb));
}
if (!err) {
err = percpu_counter_init(&sbi->s_dirs_counter,
ext3_count_dirs(sb));
}
if (err) {
printk(KERN_ERR "EXT3-fs: insufficient memory\n");
goto failed_mount3;
}
/* per fileystem reservation list head & lock */
spin_lock_init(&sbi->s_rsv_window_lock);

21
fs/ext4/super.c
View file

@ -1479,6 +1479,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
int needs_recovery;
__le32 features;
__u64 blocks_count;
int err;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
@ -1759,12 +1760,20 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
get_random_bytes(&sbi->s_next_generation, sizeof(u32));
spin_lock_init(&sbi->s_next_gen_lock);
percpu_counter_init(&sbi->s_freeblocks_counter,
ext4_count_free_blocks(sb));
percpu_counter_init(&sbi->s_freeinodes_counter,
ext4_count_free_inodes(sb));
percpu_counter_init(&sbi->s_dirs_counter,
ext4_count_dirs(sb));
err = percpu_counter_init(&sbi->s_freeblocks_counter,
ext4_count_free_blocks(sb));
if (!err) {
err = percpu_counter_init(&sbi->s_freeinodes_counter,
ext4_count_free_inodes(sb));
}
if (!err) {
err = percpu_counter_init(&sbi->s_dirs_counter,
ext4_count_dirs(sb));
}
if (err) {
printk(KERN_ERR "EXT4-fs: insufficient memory\n");
goto failed_mount3;
}
/* per fileystem reservation list head & lock */
spin_lock_init(&sbi->s_rsv_window_lock);

5
include/linux/percpu_counter.h
View file

@ -30,7 +30,7 @@ struct percpu_counter {
#define FBC_BATCH (NR_CPUS*4)
#endif
void percpu_counter_init(struct percpu_counter *fbc, s64 amount);
int percpu_counter_init(struct percpu_counter *fbc, s64 amount);
void percpu_counter_destroy(struct percpu_counter *fbc);
void percpu_counter_set(struct percpu_counter *fbc, s64 amount);
void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch);
@ -78,9 +78,10 @@ struct percpu_counter {
s64 count;
};
static inline void percpu_counter_init(struct percpu_counter *fbc, s64 amount)
static inline int percpu_counter_init(struct percpu_counter *fbc, s64 amount)
{
fbc->count = amount;
return 0;
}
static inline void percpu_counter_destroy(struct percpu_counter *fbc)

8
lib/percpu_counter.c
View file

@ -68,21 +68,27 @@ s64 __percpu_counter_sum(struct percpu_counter *fbc)
}
EXPORT_SYMBOL(__percpu_counter_sum);
void percpu_counter_init(struct percpu_counter *fbc, s64 amount)
int percpu_counter_init(struct percpu_counter *fbc, s64 amount)
{
spin_lock_init(&fbc->lock);
fbc->count = amount;
fbc->counters = alloc_percpu(s32);
if (!fbc->counters)
return -ENOMEM;
#ifdef CONFIG_HOTPLUG_CPU
mutex_lock(&percpu_counters_lock);
list_add(&fbc->list, &percpu_counters);
mutex_unlock(&percpu_counters_lock);
#endif
return 0;
}
EXPORT_SYMBOL(percpu_counter_init);
void percpu_counter_destroy(struct percpu_counter *fbc)
{
if (!fbc->counters)
return;
free_percpu(fbc->counters);
#ifdef CONFIG_HOTPLUG_CPU
mutex_lock(&percpu_counters_lock);