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shmem: Comment fixups

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Remove the last mentions of radix tree from various comments.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Matthew Wilcox 2017-12-04 03:31:13 -05:00
parent ef3038a573
commit 7f4446eefe
1 changed files with 6 additions and 6 deletions
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12
mm/shmem.c
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@ -763,7 +763,7 @@ void shmem_unlock_mapping(struct address_space *mapping)
} }
/* /*
* Remove range of pages and swap entries from radix tree, and free them. * Remove range of pages and swap entries from page cache, and free them.
* If !unfalloc, truncate or punch hole; if unfalloc, undo failed fallocate. * If !unfalloc, truncate or punch hole; if unfalloc, undo failed fallocate.
*/ */
static void shmem_undo_range(struct inode *inode, loff_t lstart, loff_t lend, static void shmem_undo_range(struct inode *inode, loff_t lstart, loff_t lend,
@ -1143,10 +1143,10 @@ static int shmem_unuse_inode(struct shmem_inode_info *info,
* We needed to drop mutex to make that restrictive page * We needed to drop mutex to make that restrictive page
* allocation, but the inode might have been freed while we * allocation, but the inode might have been freed while we
* dropped it: although a racing shmem_evict_inode() cannot * dropped it: although a racing shmem_evict_inode() cannot
* complete without emptying the radix_tree, our page lock * complete without emptying the page cache, our page lock
* on this swapcache page is not enough to prevent that - * on this swapcache page is not enough to prevent that -
* free_swap_and_cache() of our swap entry will only * free_swap_and_cache() of our swap entry will only
* trylock_page(), removing swap from radix_tree whatever. * trylock_page(), removing swap from page cache whatever.
* *
* We must not proceed to shmem_add_to_page_cache() if the * We must not proceed to shmem_add_to_page_cache() if the
* inode has been freed, but of course we cannot rely on * inode has been freed, but of course we cannot rely on
@ -1212,7 +1212,7 @@ int shmem_unuse(swp_entry_t swap, struct page *page)
&memcg, false); &memcg, false);
if (error) if (error)
goto out; goto out;
/* No radix_tree_preload: swap entry keeps a place for page in tree */ /* No memory allocation: swap entry occupies the slot for the page */
error = -EAGAIN; error = -EAGAIN;
mutex_lock(&shmem_swaplist_mutex); mutex_lock(&shmem_swaplist_mutex);
@ -1887,7 +1887,7 @@ unlock:
spin_unlock_irq(&info->lock); spin_unlock_irq(&info->lock);
goto repeat; goto repeat;
} }
if (error == -EEXIST) /* from above or from radix_tree_insert */ if (error == -EEXIST)
goto repeat; goto repeat;
return error; return error;
} }
@ -2501,7 +2501,7 @@ static ssize_t shmem_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
} }
/* /*
* llseek SEEK_DATA or SEEK_HOLE through the radix_tree. * llseek SEEK_DATA or SEEK_HOLE through the page cache.
*/ */
static pgoff_t shmem_seek_hole_data(struct address_space *mapping, static pgoff_t shmem_seek_hole_data(struct address_space *mapping,
pgoff_t index, pgoff_t end, int whence) pgoff_t index, pgoff_t end, int whence)