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NTFS: Use MAX_BUF_PER_PAGE instead of variable sized array allocation for 

better code generation and one less sparse warning in fs/ntfs/aops.c.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
This commit is contained in:
Anton Altaparmakov 2005-04-06 16:11:20 +01:00
parent 7fafb8b634
commit d53ee32224
2 changed files with 10 additions and 6 deletions
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2
fs/ntfs/ChangeLog
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@ -113,6 +113,8 @@ ToDo/Notes:
- Update attribute definition handling.
- Add NTFS_MAX_CLUSTER_SIZE and NTFS_MAX_PAGES_PER_CLUSTER constants.
- Use NTFS_MAX_CLUSTER_SIZE in super.c instead of hard coding 0x10000.
- Use MAX_BUF_PER_PAGE instead of variable sized array allocation for
better code generation and one less sparse warning in fs/ntfs/aops.c.
2.1.22 - Many bug and race fixes and error handling improvements.

14
fs/ntfs/aops.c
View File

@ -825,17 +825,15 @@ static int ntfs_write_mst_block(struct page *page,
ntfs_inode *ni = NTFS_I(vi);
ntfs_volume *vol = ni->vol;
u8 *kaddr;
unsigned char bh_size_bits = vi->i_blkbits;
unsigned int bh_size = 1 << bh_size_bits;
unsigned int rec_size = ni->itype.index.block_size;
ntfs_inode *locked_nis[PAGE_CACHE_SIZE / rec_size];
struct buffer_head *bh, *head, *tbh, *rec_start_bh;
int max_bhs = PAGE_CACHE_SIZE / bh_size;
struct buffer_head *bhs[max_bhs];
struct buffer_head *bhs[MAX_BUF_PER_PAGE];
runlist_element *rl;
int i, nr_locked_nis, nr_recs, nr_bhs, bhs_per_rec, err, err2;
unsigned rec_size_bits;
int i, nr_locked_nis, nr_recs, nr_bhs, max_bhs, bhs_per_rec, err, err2;
unsigned bh_size, rec_size_bits;
BOOL sync, is_mft, page_is_dirty, rec_is_dirty;
unsigned char bh_size_bits;
ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, page index "
"0x%lx.", vi->i_ino, ni->type, page->index);
@ -850,7 +848,11 @@ static int ntfs_write_mst_block(struct page *page,
*/
BUG_ON(!(is_mft || S_ISDIR(vi->i_mode) ||
(NInoAttr(ni) && ni->type == AT_INDEX_ALLOCATION)));
bh_size_bits = vi->i_blkbits;
bh_size = 1 << bh_size_bits;
max_bhs = PAGE_CACHE_SIZE / bh_size;
BUG_ON(!max_bhs);
BUG_ON(max_bhs > MAX_BUF_PER_PAGE);
/* Were we called for sync purposes? */
sync = (wbc->sync_mode == WB_SYNC_ALL);