xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

hpfs: remove the BKL

Browse Source 
This removes the BKL in hpfs in a rather awful
way, by making the code only work on uniprocessor
systems without kernel preemption, as suggested
by Andi Kleen.

The HPFS code probably has close to zero remaining
users on current kernels, all archeological uses of
the file system can probably be done with the significant
restrictions.

The hpfs_lock/hpfs_unlock functions are left in the
code, sincen Mikulas has indicated that he is still
interested in fixing it in a better way.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Andi Kleen <ak@linux.intel.com>
Cc: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: linux-fsdevel@vger.kernel.org
This commit is contained in:
Arnd Bergmann
2011-01-22 20:26:12 +01:00
parent 5edc341313
commit 9a311b96c3
7 changed files with 75 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
fs/hpfs/dir.c
View File

@@ -6,16 +6,15 @@
* directory VFS functions
*/
#include <linux/smp_lock.h>
#include <linux/slab.h>
#include "hpfs_fn.h"
static int hpfs_dir_release(struct inode *inode, struct file *filp)
{
lock_kernel();
hpfs_lock(inode->i_sb);
hpfs_del_pos(inode, &filp->f_pos);
/*hpfs_write_if_changed(inode);*/
unlock_kernel();
hpfs_unlock(inode->i_sb);
return 0;
}
@@ -30,7 +29,7 @@ static loff_t hpfs_dir_lseek(struct file *filp, loff_t off, int whence)
struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
struct super_block *s = i->i_sb;
lock_kernel();
hpfs_lock(s);
/*printk("dir lseek\n");*/
if (new_off == 0 || new_off == 1 || new_off == 11 || new_off == 12 || new_off == 13) goto ok;
@@ -43,12 +42,12 @@ static loff_t hpfs_dir_lseek(struct file *filp, loff_t off, int whence)
}
mutex_unlock(&i->i_mutex);
ok:
unlock_kernel();
hpfs_unlock(s);
return filp->f_pos = new_off;
fail:
mutex_unlock(&i->i_mutex);
/*printk("illegal lseek: %016llx\n", new_off);*/
unlock_kernel();
hpfs_unlock(s);
return -ESPIPE;
}
@@ -64,7 +63,7 @@ static int hpfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
int c1, c2 = 0;
int ret = 0;
lock_kernel();
hpfs_lock(inode->i_sb);
if (hpfs_sb(inode->i_sb)->sb_chk) {
if (hpfs_chk_sectors(inode->i_sb, inode->i_ino, 1, "dir_fnode")) {
@@ -167,7 +166,7 @@ static int hpfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
hpfs_brelse4(&qbh);
}
out:
unlock_kernel();
hpfs_unlock(inode->i_sb);
return ret;
}
@@ -197,10 +196,10 @@ struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, struct name
struct inode *result = NULL;
struct hpfs_inode_info *hpfs_result;
lock_kernel();
hpfs_lock(dir->i_sb);
if ((err = hpfs_chk_name(name, &len))) {
if (err == -ENAMETOOLONG) {
unlock_kernel();
hpfs_unlock(dir->i_sb);
return ERR_PTR(-ENAMETOOLONG);
}
goto end_add;
@@ -298,7 +297,7 @@ struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, struct name
end:
end_add:
unlock_kernel();
hpfs_unlock(dir->i_sb);
d_add(dentry, result);
return NULL;
@@ -311,7 +310,7 @@ struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, struct name
/*bail:*/
unlock_kernel();
hpfs_unlock(dir->i_sb);
return ERR_PTR(-ENOENT);
}