On Wed, 2 May 2007, Trond Myklebust wrote:
> commit c5a4dd8b7c15927a8fbff83171b57cad675a79b9
> Author: Chuck Lever <[email protected]>
> Date: Thu Mar 29 16:47:58 2007 -0400
>
> SUNRPC: Eliminate side effects from rpc_malloc
>
> Currently rpc_malloc sets req->rq_buffer internally. Make this a more
> generic interface: return a pointer to the new buffer (or NULL) and
> make the caller set req->rq_buffer and req->rq_bufsize. This looks much
> more like kmalloc and eliminates the side effects.
>
> To fix a potential deadlock, this patch also replaces GFP_NOFS with
> GFP_NOWAIT in rpc_malloc. This prevents async RPCs from sleeping outside
> the RPC's task scheduler while allocating their buffer.
>
> Signed-off-by: Chuck Lever <[email protected]>
> Signed-off-by: Trond Myklebust <[email protected]>
This patch introduced the following compiler warnings:
net/sunrpc/sched.c:766: warning: format ‘%u’ expects type ‘unsigned int’, but argument 3 has type ‘size_t’
net/sunrpc/sched.c:785: warning: format ‘%u’ expects type ‘unsigned int’, but argument 2 has type ‘size_t’
- Use %zu to format size_t
- Kill 2 useless casts
Signed-off-by: Geert Uytterhoeven <[email protected]>
--- ps3-linux-2.6.21.orig/net/sunrpc/sched.c
+++ ps3-linux-2.6.21/net/sunrpc/sched.c
@@ -763,9 +763,9 @@ void *rpc_malloc(struct rpc_task *task,
else
buf = kmalloc(size, gfp);
*buf = size;
- dprintk("RPC: %5u allocated buffer of size %u at %p\n",
+ dprintk("RPC: %5u allocated buffer of size %zu at %p\n",
task->tk_pid, size, buf);
- return (void *) ++buf;
+ return ++buf;
}
/**
@@ -775,14 +775,14 @@ void *rpc_malloc(struct rpc_task *task,
*/
void rpc_free(void *buffer)
{
- size_t size, *buf = (size_t *) buffer;
+ size_t size, *buf = buffer;
if (!buffer)
return;
size = *buf;
buf--;
- dprintk("RPC: freeing buffer of size %u at %p\n",
+ dprintk("RPC: freeing buffer of size %zu at %p\n",
size, buf);
if (size <= RPC_BUFFER_MAXSIZE)
mempool_free(buf, rpc_buffer_mempool);
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- Sony Network and Software Technology Center Europe (NSCE)
[email protected] ------- The Corporate Village, Da Vincilaan 7-D1
Voice +32-2-7008453 Fax +32-2-7008622 ---------------- B-1935 Zaventem, Belgium
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