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, 4 insertions, 1 deletions

diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index f4718098ac31..ce7181ea60fa 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -218,12 +218,15 @@ static int load_misc_binary(struct linux_binprm *bprm)
 
         bprm->file = interp_file;
         if (fmt->flags & MISC_FMT_CREDENTIALS) {
+                loff_t pos = 0;
+
                 /*
                  * No need to call prepare_binprm(), it's already been
                  * done.  bprm->buf is stale, update from interp_file.
                  */
                 memset(bprm->buf, 0, BINPRM_BUF_SIZE);
-                retval = kernel_read(bprm->file, 0, bprm->buf, BINPRM_BUF_SIZE);
+                retval = kernel_read(bprm->file, bprm->buf, BINPRM_BUF_SIZE,
+                                &pos);
         } else
                 retval = prepare_binprm(bprm);