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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2008-04-17 16:38:59 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-04-17 16:38:59 +0200 |
| commit | 9a0762c5af40e4aa64fef999967459c98e6ae4c9 (patch) | |
| tree | a674077f5a3b840e31f0706d074e01fa4dd18abc | |
| parent | ext4: reduce mballoc stack usage with noinline_for_stack (diff) | |
| download | linux-9a0762c5af40e4aa64fef999967459c98e6ae4c9.tar.xz linux-9a0762c5af40e4aa64fef999967459c98e6ae4c9.zip | |
ext4: Convert list_for_each_rcu() to list_for_each_entry_rcu()
The list_for_each_entry_rcu() primitive should be used instead of
list_for_each_rcu(), as the former is easier to use and provides
better type safety.
http://groups.google.com/group/linux.kernel/browse_thread/thread/45749c83451cebeb/0633a65759ce7713?lnk=raot
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/mballoc.c | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 66e1451f64e7..aaaccf5986f9 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -3149,10 +3149,10 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac, { int bsbits, max; ext4_lblk_t end; - struct list_head *cur; loff_t size, orig_size, start_off; ext4_lblk_t start, orig_start; struct ext4_inode_info *ei = EXT4_I(ac->ac_inode); + struct ext4_prealloc_space *pa; /* do normalize only data requests, metadata requests do not need preallocation */ @@ -3238,12 +3238,9 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac, /* check we don't cross already preallocated blocks */ rcu_read_lock(); - list_for_each_rcu(cur, &ei->i_prealloc_list) { - struct ext4_prealloc_space *pa; + list_for_each_entry_rcu(pa, &ei->i_prealloc_list, pa_inode_list) { unsigned long pa_end; - pa = list_entry(cur, struct ext4_prealloc_space, pa_inode_list); - if (pa->pa_deleted) continue; spin_lock(&pa->pa_lock); @@ -3285,10 +3282,8 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac, /* XXX: extra loop to check we really don't overlap preallocations */ rcu_read_lock(); - list_for_each_rcu(cur, &ei->i_prealloc_list) { - struct ext4_prealloc_space *pa; + list_for_each_entry_rcu(pa, &ei->i_prealloc_list, pa_inode_list) { unsigned long pa_end; - pa = list_entry(cur, struct ext4_prealloc_space, pa_inode_list); spin_lock(&pa->pa_lock); if (pa->pa_deleted == 0) { pa_end = pa->pa_lstart + pa->pa_len; @@ -3416,7 +3411,6 @@ ext4_mb_use_preallocated(struct ext4_allocation_context *ac) struct ext4_inode_info *ei = EXT4_I(ac->ac_inode); struct ext4_locality_group *lg; struct ext4_prealloc_space *pa; - struct list_head *cur; /* only data can be preallocated */ if (!(ac->ac_flags & EXT4_MB_HINT_DATA)) @@ -3424,8 +3418,7 @@ ext4_mb_use_preallocated(struct ext4_allocation_context *ac) /* first, try per-file preallocation */ rcu_read_lock(); - list_for_each_rcu(cur, &ei->i_prealloc_list) { - pa = list_entry(cur, struct ext4_prealloc_space, pa_inode_list); + list_for_each_entry_rcu(pa, &ei->i_prealloc_list, pa_inode_list) { /* all fields in this condition don't change, * so we can skip locking for them */ @@ -3457,8 +3450,7 @@ ext4_mb_use_preallocated(struct ext4_allocation_context *ac) return 0; rcu_read_lock(); - list_for_each_rcu(cur, &lg->lg_prealloc_list) { - pa = list_entry(cur, struct ext4_prealloc_space, pa_inode_list); + list_for_each_entry_rcu(pa, &lg->lg_prealloc_list, pa_inode_list) { spin_lock(&pa->pa_lock); if (pa->pa_deleted == 0 && pa->pa_free >= ac->ac_o_ex.fe_len) { atomic_inc(&pa->pa_count); |