fs: fix kernel_read prototype

Use proper ssize_t and size_t types for the return value and count
argument, move the offset last and make it an in/out argument like
all other read/write helpers, and make the buf argument a void pointer
to get rid of lots of casts in the callers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 2 insertions, 1 deletions

diff --git a/security/keys/big_key.c b/security/keys/big_key.c
index 835c1ab30d01..9f4c86cade8e 100644
--- a/security/keys/big_key.c
+++ b/security/keys/big_key.c
@@ -295,6 +295,7 @@ long big_key_read(const struct key *key, char __user *buffer, size_t buflen)
                 u8 *data;
                 u8 *enckey = (u8 *)key->payload.data[big_key_data];
                 size_t enclen = ALIGN(datalen, crypto_skcipher_blocksize(big_key_skcipher));
+                loff_t pos = 0;
 
                 data = kmalloc(enclen, GFP_KERNEL);
                 if (!data)
@@ -307,7 +308,7 @@ long big_key_read(const struct key *key, char __user *buffer, size_t buflen)
                 }
 
                 /* read file to kernel and decrypt */
-                ret = kernel_read(file, 0, data, enclen);
+                ret = kernel_read(file, data, enclen, &pos);
                 if (ret >= 0 && ret != enclen) {
                         ret = -EIO;
                         goto err_fput;