Commit 08a66859 authored by Dan Carpenter's avatar Dan Carpenter Committed by Linus Torvalds

FS-Cache: Remove unneeded null checks

fscache_write_op() makes unnecessary checks of the page variable to see if it
is NULL.  It can't be NULL at those points as the kernel would already have
crashed a little higher up where we examined page->index.

Furthermore, unless radix_tree_gang_lookup_tag() can return 1 but no page, a
NULL pointer crash should not be encountered there as we can only get there if
r_t_g_l_t() returned 1.
Signed-off-by: default avatarDan Carpenter <error27@gmail.com>
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0a6531eb
...@@ -710,30 +710,26 @@ static void fscache_write_op(struct fscache_operation *_op) ...@@ -710,30 +710,26 @@ static void fscache_write_op(struct fscache_operation *_op)
goto superseded; goto superseded;
} }
if (page) { radix_tree_tag_set(&cookie->stores, page->index,
radix_tree_tag_set(&cookie->stores, page->index, FSCACHE_COOKIE_STORING_TAG);
FSCACHE_COOKIE_STORING_TAG); radix_tree_tag_clear(&cookie->stores, page->index,
radix_tree_tag_clear(&cookie->stores, page->index, FSCACHE_COOKIE_PENDING_TAG);
FSCACHE_COOKIE_PENDING_TAG);
}
spin_unlock(&cookie->stores_lock); spin_unlock(&cookie->stores_lock);
spin_unlock(&object->lock); spin_unlock(&object->lock);
if (page) { fscache_set_op_state(&op->op, "Store");
fscache_set_op_state(&op->op, "Store"); fscache_stat(&fscache_n_store_pages);
fscache_stat(&fscache_n_store_pages); fscache_stat(&fscache_n_cop_write_page);
fscache_stat(&fscache_n_cop_write_page); ret = object->cache->ops->write_page(op, page);
ret = object->cache->ops->write_page(op, page); fscache_stat_d(&fscache_n_cop_write_page);
fscache_stat_d(&fscache_n_cop_write_page); fscache_set_op_state(&op->op, "EndWrite");
fscache_set_op_state(&op->op, "EndWrite"); fscache_end_page_write(object, page);
fscache_end_page_write(object, page); if (ret < 0) {
if (ret < 0) { fscache_set_op_state(&op->op, "Abort");
fscache_set_op_state(&op->op, "Abort"); fscache_abort_object(object);
fscache_abort_object(object); } else {
} else { fscache_enqueue_operation(&op->op);
fscache_enqueue_operation(&op->op);
}
} }
_leave(""); _leave("");
......
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