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fs: add iput_not_last()

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Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20251105212025.807549-1-mjguzik@gmail.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Mateusz Guzik 2025-11-05 22:20:24 +01:00 committed by Christian Brauner
parent 3cd1548a27
commit 1274162464
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2 changed files with 13 additions and 0 deletions
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12
fs/inode.c
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@ -1967,6 +1967,18 @@ retry:
} }
EXPORT_SYMBOL(iput); EXPORT_SYMBOL(iput);
/**
* iput_not_last - put an inode assuming this is not the last reference
* @inode: inode to put
*/
void iput_not_last(struct inode *inode)
{
VFS_BUG_ON_INODE(atomic_read(&inode->i_count) < 2, inode);
WARN_ON(atomic_sub_return(1, &inode->i_count) == 0);
}
EXPORT_SYMBOL(iput_not_last);
#ifdef CONFIG_BLOCK #ifdef CONFIG_BLOCK
/** /**
* bmap - find a block number in a file * bmap - find a block number in a file

1
include/linux/fs.h
View File

@ -2824,6 +2824,7 @@ extern int current_umask(void);
extern void ihold(struct inode * inode); extern void ihold(struct inode * inode);
extern void iput(struct inode *); extern void iput(struct inode *);
void iput_not_last(struct inode *);
int inode_update_timestamps(struct inode *inode, int flags); int inode_update_timestamps(struct inode *inode, int flags);
int generic_update_time(struct inode *, int); int generic_update_time(struct inode *, int);