lib: percpu_counter_init error handling
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>
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bf1d89c813
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833f4077bf
5 changed files with 52 additions and 18 deletions
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@ -653,6 +653,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
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int db_count;
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int i, j;
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__le32 features;
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int err;
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sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
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if (!sbi)
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@ -906,12 +907,20 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
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get_random_bytes(&sbi->s_next_generation, sizeof(u32));
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spin_lock_init(&sbi->s_next_gen_lock);
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percpu_counter_init(&sbi->s_freeblocks_counter,
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err = percpu_counter_init(&sbi->s_freeblocks_counter,
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ext2_count_free_blocks(sb));
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percpu_counter_init(&sbi->s_freeinodes_counter,
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if (!err) {
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err = percpu_counter_init(&sbi->s_freeinodes_counter,
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ext2_count_free_inodes(sb));
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percpu_counter_init(&sbi->s_dirs_counter,
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}
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if (!err) {
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err = percpu_counter_init(&sbi->s_dirs_counter,
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ext2_count_dirs(sb));
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}
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if (err) {
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printk(KERN_ERR "EXT2-fs: insufficient memory\n");
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goto failed_mount3;
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}
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/*
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* set up enough so that it can read an inode
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*/
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@ -1416,6 +1416,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
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int i;
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int needs_recovery;
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__le32 features;
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int err;
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sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
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if (!sbi)
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@ -1675,12 +1676,20 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
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get_random_bytes(&sbi->s_next_generation, sizeof(u32));
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spin_lock_init(&sbi->s_next_gen_lock);
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percpu_counter_init(&sbi->s_freeblocks_counter,
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err = percpu_counter_init(&sbi->s_freeblocks_counter,
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ext3_count_free_blocks(sb));
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percpu_counter_init(&sbi->s_freeinodes_counter,
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if (!err) {
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err = percpu_counter_init(&sbi->s_freeinodes_counter,
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ext3_count_free_inodes(sb));
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percpu_counter_init(&sbi->s_dirs_counter,
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}
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if (!err) {
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err = percpu_counter_init(&sbi->s_dirs_counter,
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ext3_count_dirs(sb));
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}
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if (err) {
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printk(KERN_ERR "EXT3-fs: insufficient memory\n");
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goto failed_mount3;
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}
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/* per fileystem reservation list head & lock */
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spin_lock_init(&sbi->s_rsv_window_lock);
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@ -1479,6 +1479,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
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int needs_recovery;
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__le32 features;
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__u64 blocks_count;
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int err;
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sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
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if (!sbi)
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@ -1759,12 +1760,20 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
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get_random_bytes(&sbi->s_next_generation, sizeof(u32));
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spin_lock_init(&sbi->s_next_gen_lock);
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percpu_counter_init(&sbi->s_freeblocks_counter,
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err = percpu_counter_init(&sbi->s_freeblocks_counter,
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ext4_count_free_blocks(sb));
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percpu_counter_init(&sbi->s_freeinodes_counter,
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if (!err) {
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err = percpu_counter_init(&sbi->s_freeinodes_counter,
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ext4_count_free_inodes(sb));
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percpu_counter_init(&sbi->s_dirs_counter,
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}
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if (!err) {
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err = percpu_counter_init(&sbi->s_dirs_counter,
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ext4_count_dirs(sb));
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}
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if (err) {
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printk(KERN_ERR "EXT4-fs: insufficient memory\n");
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goto failed_mount3;
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}
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/* per fileystem reservation list head & lock */
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spin_lock_init(&sbi->s_rsv_window_lock);
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@ -30,7 +30,7 @@ struct percpu_counter {
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#define FBC_BATCH (NR_CPUS*4)
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#endif
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void percpu_counter_init(struct percpu_counter *fbc, s64 amount);
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int percpu_counter_init(struct percpu_counter *fbc, s64 amount);
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void percpu_counter_destroy(struct percpu_counter *fbc);
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void percpu_counter_set(struct percpu_counter *fbc, s64 amount);
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void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch);
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@ -78,9 +78,10 @@ struct percpu_counter {
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s64 count;
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};
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static inline void percpu_counter_init(struct percpu_counter *fbc, s64 amount)
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static inline int percpu_counter_init(struct percpu_counter *fbc, s64 amount)
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{
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fbc->count = amount;
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return 0;
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}
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static inline void percpu_counter_destroy(struct percpu_counter *fbc)
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@ -68,21 +68,27 @@ s64 __percpu_counter_sum(struct percpu_counter *fbc)
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}
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EXPORT_SYMBOL(__percpu_counter_sum);
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void percpu_counter_init(struct percpu_counter *fbc, s64 amount)
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int percpu_counter_init(struct percpu_counter *fbc, s64 amount)
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{
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spin_lock_init(&fbc->lock);
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fbc->count = amount;
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fbc->counters = alloc_percpu(s32);
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if (!fbc->counters)
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return -ENOMEM;
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#ifdef CONFIG_HOTPLUG_CPU
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mutex_lock(&percpu_counters_lock);
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list_add(&fbc->list, &percpu_counters);
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mutex_unlock(&percpu_counters_lock);
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#endif
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return 0;
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}
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EXPORT_SYMBOL(percpu_counter_init);
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void percpu_counter_destroy(struct percpu_counter *fbc)
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{
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if (!fbc->counters)
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return;
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free_percpu(fbc->counters);
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#ifdef CONFIG_HOTPLUG_CPU
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mutex_lock(&percpu_counters_lock);
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