xiaomi-sm8450/android_kernel_xiaomi_sm8450
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wrappers for ->i_mutex access

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parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).

Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2016-01-22 15:40:57 -05:00
parent 57b8f112cf
commit 5955102c99
177 changed files with 908 additions and 883 deletions
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12
mm/swapfile.c
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@@ -1956,9 +1956,9 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
set_blocksize(bdev, old_block_size);
blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
} else {
mutex_lock(&inode->i_mutex);
inode_lock(inode);
inode->i_flags &= ~S_SWAPFILE;
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
}
filp_close(swap_file, NULL);
@@ -2183,7 +2183,7 @@ static int claim_swapfile(struct swap_info_struct *p, struct inode *inode)
p->flags |= SWP_BLKDEV;
} else if (S_ISREG(inode->i_mode)) {
p->bdev = inode->i_sb->s_bdev;
mutex_lock(&inode->i_mutex);
inode_lock(inode);
if (IS_SWAPFILE(inode))
return -EBUSY;
} else
@@ -2416,7 +2416,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
mapping = swap_file->f_mapping;
inode = mapping->host;
/* If S_ISREG(inode->i_mode) will do mutex_lock(&inode->i_mutex); */
/* If S_ISREG(inode->i_mode) will do inode_lock(inode); */
error = claim_swapfile(p, inode);
if (unlikely(error))
goto bad_swap;
@@ -2561,7 +2561,7 @@ bad_swap:
vfree(cluster_info);
if (swap_file) {
if (inode && S_ISREG(inode->i_mode)) {
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
inode = NULL;
}
filp_close(swap_file, NULL);
@@ -2574,7 +2574,7 @@ out:
if (name)
putname(name);
if (inode && S_ISREG(inode->i_mode))
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
return error;
}