diff options
Diffstat (limited to 'fs/minix/bitmap.c')
| -rw-r--r-- | fs/minix/bitmap.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/fs/minix/bitmap.c b/fs/minix/bitmap.c index 3aebe322271..6ac693faae4 100644 --- a/fs/minix/bitmap.c +++ b/fs/minix/bitmap.c @@ -12,13 +12,14 @@ /* bitmap.c contains the code that handles the inode and block bitmaps */ #include "minix.h" -#include <linux/smp_lock.h> #include <linux/buffer_head.h> #include <linux/bitops.h> #include <linux/sched.h> static const int nibblemap[] = { 4,3,3,2,3,2,2,1,3,2,2,1,2,1,1,0 }; +static DEFINE_SPINLOCK(bitmap_lock); + static unsigned long count_free(struct buffer_head *map[], unsigned numblocks, __u32 numbits) { unsigned i, j, sum = 0; @@ -69,11 +70,11 @@ void minix_free_block(struct inode *inode, unsigned long block) return; } bh = sbi->s_zmap[zone]; - lock_kernel(); + spin_lock(&bitmap_lock); if (!minix_test_and_clear_bit(bit, bh->b_data)) printk("minix_free_block (%s:%lu): bit already cleared\n", sb->s_id, block); - unlock_kernel(); + spin_unlock(&bitmap_lock); mark_buffer_dirty(bh); return; } @@ -88,18 +89,18 @@ int minix_new_block(struct inode * inode) struct buffer_head *bh = sbi->s_zmap[i]; int j; - lock_kernel(); + spin_lock(&bitmap_lock); j = minix_find_first_zero_bit(bh->b_data, bits_per_zone); if (j < bits_per_zone) { minix_set_bit(j, bh->b_data); - unlock_kernel(); + spin_unlock(&bitmap_lock); mark_buffer_dirty(bh); j += i * bits_per_zone + sbi->s_firstdatazone-1; if (j < sbi->s_firstdatazone || j >= sbi->s_nzones) break; return j; } - unlock_kernel(); + spin_unlock(&bitmap_lock); } return 0; } @@ -211,10 +212,10 @@ void minix_free_inode(struct inode * inode) minix_clear_inode(inode); /* clear on-disk copy */ bh = sbi->s_imap[ino]; - lock_kernel(); + spin_lock(&bitmap_lock); if (!minix_test_and_clear_bit(bit, bh->b_data)) printk("minix_free_inode: bit %lu already cleared\n", bit); - unlock_kernel(); + spin_unlock(&bitmap_lock); mark_buffer_dirty(bh); out: clear_inode(inode); /* clear in-memory copy */ @@ -237,7 +238,7 @@ struct inode * minix_new_inode(const struct inode * dir, int * error) j = bits_per_zone; bh = NULL; *error = -ENOSPC; - lock_kernel(); + spin_lock(&bitmap_lock); for (i = 0; i < sbi->s_imap_blocks; i++) { bh = sbi->s_imap[i]; j = minix_find_first_zero_bit(bh->b_data, bits_per_zone); @@ -245,17 +246,17 @@ struct inode * minix_new_inode(const struct inode * dir, int * error) break; } if (!bh || j >= bits_per_zone) { - unlock_kernel(); + spin_unlock(&bitmap_lock); iput(inode); return NULL; } if (minix_test_and_set_bit(j, bh->b_data)) { /* shouldn't happen */ - unlock_kernel(); + spin_unlock(&bitmap_lock); printk("minix_new_inode: bit already set\n"); iput(inode); return NULL; } - unlock_kernel(); + spin_unlock(&bitmap_lock); mark_buffer_dirty(bh); j += i * bits_per_zone; if (!j || j > sbi->s_ninodes) { |