[PATCH] netfs, cachefiles: include linux/bio.h for BIO_MAX_VECS

[Arnd Bergmann <arnd@kernel.org>]

From: Arnd Bergmann <arnd@arndb.de>

The newly added code causes a build failure without this in some configurations:

fs/cachefiles/io.c: In function 'cachefiles_prepare_write_subreq':
fs/cachefiles/io.c:633:31: error: 'BIO_MAX_VECS' undeclared (first use in this function); did you mean 'BIO_MAX_SECTORS'?
  633 |         subreq->max_nr_segs = BIO_MAX_VECS;
      |                               ^~~~~~~~~~~~
      |                               BIO_MAX_SECTORS
fs/cachefiles/io.c:633:31: note: each undeclared identifier is reported only once for each function it appears in

Fixes: 0d393b1a6699 ("netfs, cachefiles: Implement helpers for new write code")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/cachefiles/io.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/cachefiles/io.c b/fs/cachefiles/io.c
index 437b24b0fd1c..cc5505d4ddaa 100644
--- a/fs/cachefiles/io.c
+++ b/fs/cachefiles/io.c
@@ -5,6 +5,7 @@
  * Written by David Howells (dhowells@redhat.com)
  */
 
+#include <linux/bio.h>
 #include <linux/mount.h>
 #include <linux/slab.h>
 #include <linux/file.h>
-- 
2.39.2