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fuse: categorize fuse_get_req()

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The patch categorizes all fuse_get_req() invocations into two categories:
 - fuse_get_req_nopages(fc) - when caller doesn't care about req->pages
 - fuse_get_req(fc, n) - when caller need n page pointers (n > 0)

Adding fuse_get_req_nopages() helps to avoid numerous fuse_get_req(fc, 0)
scattered over code. Now it's clear from the first glance when a caller need
fuse_req with page pointers.

The patch doesn't make any logic changes. In multi-page case, it silly
allocates array of FUSE_MAX_PAGES_PER_REQ page pointers. This will be amended
by future patches.

Signed-off-by: Maxim Patlasov <mpatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Maxim Patlasov
2012-10-26 19:48:30 +04:00
committed by Miklos Szeredi
parent 4250c0668e
commit b111c8c0e3
6 changed files with 57 additions and 45 deletions
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2
fs/fuse/cuse.c
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@@ -419,7 +419,7 @@ static int cuse_send_init(struct cuse_conn *cc)
BUILD_BUG_ON(CUSE_INIT_INFO_MAX > PAGE_SIZE);
req = fuse_get_req(fc);
req = fuse_get_req(fc, 1);
if (IS_ERR(req)) {
rc = PTR_ERR(req);
goto err;