AcoSail/kernel_optimize_test
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sysv: drop lock/unlock super

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Removed lock/unlock super. Added a new private s_lock mutex.

Signed-off-by: Marco Stornelli <marco.stornelli@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Marco Stornelli 2012-10-06 12:41:46 +02:00 committed by Al Viro
parent f6e12dc4fc
commit c07cb01c45
5 changed files with 20 additions and 18 deletions
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18
fs/sysv/balloc.c
View File

@ -60,12 +60,12 @@ void sysv_free_block(struct super_block * sb, sysv_zone_t nr)
return;
}
lock_super(sb);
mutex_lock(&sbi->s_lock);
count = fs16_to_cpu(sbi, *sbi->s_bcache_count);
if (count > sbi->s_flc_size) {
printk("sysv_free_block: flc_count > flc_size\n");
unlock_super(sb);
mutex_unlock(&sbi->s_lock);
return;
}
/* If the free list head in super-block is full, it is copied
@ -77,7 +77,7 @@ void sysv_free_block(struct super_block * sb, sysv_zone_t nr)
bh = sb_getblk(sb, block);
if (!bh) {
printk("sysv_free_block: getblk() failed\n");
unlock_super(sb);
mutex_unlock(&sbi->s_lock);
return;
}
memset(bh->b_data, 0, sb->s_blocksize);
@ -93,7 +93,7 @@ void sysv_free_block(struct super_block * sb, sysv_zone_t nr)
*sbi->s_bcache_count = cpu_to_fs16(sbi, count);
fs32_add(sbi, sbi->s_free_blocks, 1);
dirty_sb(sb);
unlock_super(sb);
mutex_unlock(&sbi->s_lock);
}
sysv_zone_t sysv_new_block(struct super_block * sb)
@ -104,7 +104,7 @@ sysv_zone_t sysv_new_block(struct super_block * sb)
struct buffer_head * bh;
unsigned count;
lock_super(sb);
mutex_lock(&sbi->s_lock);
count = fs16_to_cpu(sbi, *sbi->s_bcache_count);
if (count == 0) /* Applies only to Coherent FS */
@ -147,11 +147,11 @@ sysv_zone_t sysv_new_block(struct super_block * sb)
/* Now the free list head in the superblock is valid again. */
fs32_add(sbi, sbi->s_free_blocks, -1);
dirty_sb(sb);
unlock_super(sb);
mutex_unlock(&sbi->s_lock);
return nr;
Enospc:
unlock_super(sb);
mutex_unlock(&sbi->s_lock);
return 0;
}
@ -173,7 +173,7 @@ unsigned long sysv_count_free_blocks(struct super_block * sb)
if (sbi->s_type == FSTYPE_AFS)
return 0;
lock_super(sb);
mutex_lock(&sbi->s_lock);
sb_count = fs32_to_cpu(sbi, *sbi->s_free_blocks);
if (0)
@ -211,7 +211,7 @@ unsigned long sysv_count_free_blocks(struct super_block * sb)
if (count != sb_count)
goto Ecount;
done:
unlock_super(sb);
mutex_unlock(&sbi->s_lock);
return count;
Einval:

14
fs/sysv/ialloc.c
View File

@ -118,7 +118,7 @@ void sysv_free_inode(struct inode * inode)
"%s\n", inode->i_sb->s_id);
return;
}
lock_super(sb);
mutex_lock(&sbi->s_lock);
count = fs16_to_cpu(sbi, *sbi->s_sb_fic_count);
if (count < sbi->s_fic_size) {
*sv_sb_fic_inode(sb,count++) = cpu_to_fs16(sbi, ino);
@ -128,7 +128,7 @@ void sysv_free_inode(struct inode * inode)
dirty_sb(sb);
memset(raw_inode, 0, sizeof(struct sysv_inode));
mark_buffer_dirty(bh);
unlock_super(sb);
mutex_unlock(&sbi->s_lock);
brelse(bh);
}
@ -147,13 +147,13 @@ struct inode * sysv_new_inode(const struct inode * dir, umode_t mode)
if (!inode)
return ERR_PTR(-ENOMEM);
lock_super(sb);
mutex_lock(&sbi->s_lock);
count = fs16_to_cpu(sbi, *sbi->s_sb_fic_count);
if (count == 0 || (*sv_sb_fic_inode(sb,count-1) == 0)) {
count = refill_free_cache(sb);
if (count == 0) {
iput(inode);
unlock_super(sb);
mutex_unlock(&sbi->s_lock);
return ERR_PTR(-ENOSPC);
}
}
@ -174,7 +174,7 @@ struct inode * sysv_new_inode(const struct inode * dir, umode_t mode)
sysv_write_inode(inode, &wbc); /* ensure inode not allocated again */
mark_inode_dirty(inode); /* cleared by sysv_write_inode() */
/* That's it. */
unlock_super(sb);
mutex_unlock(&sbi->s_lock);
return inode;
}
@ -185,7 +185,7 @@ unsigned long sysv_count_free_inodes(struct super_block * sb)
struct sysv_inode * raw_inode;
int ino, count, sb_count;
lock_super(sb);
mutex_lock(&sbi->s_lock);
sb_count = fs16_to_cpu(sbi, *sbi->s_sb_total_free_inodes);
@ -213,7 +213,7 @@ unsigned long sysv_count_free_inodes(struct super_block * sb)
if (count != sb_count)
goto Einval;
out:
unlock_super(sb);
mutex_unlock(&sbi->s_lock);
return count;
Einval:

4
fs/sysv/inode.c
View File

@ -36,7 +36,7 @@ static int sysv_sync_fs(struct super_block *sb, int wait)
struct sysv_sb_info *sbi = SYSV_SB(sb);
unsigned long time = get_seconds(), old_time;
lock_super(sb);
mutex_lock(&sbi->s_lock);
/*
* If we are going to write out the super block,
@ -51,7 +51,7 @@ static int sysv_sync_fs(struct super_block *sb, int wait)
mark_buffer_dirty(sbi->s_bh2);
}
unlock_super(sb);
mutex_unlock(&sbi->s_lock);
return 0;
}

1
fs/sysv/super.c
View File

@ -368,6 +368,7 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_sb = sb;
sbi->s_block_base = 0;
mutex_init(&sbi->s_lock);
sb->s_fs_info = sbi;
sb_set_blocksize(sb, BLOCK_SIZE);

1
fs/sysv/sysv.h
View File

@ -58,6 +58,7 @@ struct sysv_sb_info {
u32 s_nzones; /* same as s_sbd->s_fsize */
u16 s_namelen; /* max length of dir entry */
int s_forced_ro;
struct mutex s_lock;
};
/*