2011-11-19 11:29:36

by Thomas Meyer

Subject: [PATCH] nfsd4: Use kmemdup rather than duplicating its implementation

The semantic patch that makes this change is available
in scripts/coccinelle/api/memdup.cocci.

Signed-off-by: Thomas Meyer <[email protected]>
---

diff -u -p a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
--- a/fs/nfsd/nfs4state.c 2011-11-07 19:38:23.353822940 +0100
+++ b/fs/nfsd/nfs4state.c 2011-11-08 10:34:05.545953251 +0100
@@ -985,12 +985,11 @@ static struct nfs4_client *alloc_client(
clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
if (clp == NULL)
return NULL;
- clp->cl_name.data = kmalloc(name.len, GFP_KERNEL);
+ clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
if (clp->cl_name.data == NULL) {
kfree(clp);
return NULL;
}
- memcpy(clp->cl_name.data, name.data, name.len);
clp->cl_name.len = name.len;
return clp;
}
diff -u -p a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
--- a/fs/nfsd/nfs4xdr.c 2011-11-07 19:38:23.357156324 +0100
+++ b/fs/nfsd/nfs4xdr.c 2011-11-08 10:34:08.289323359 +0100
@@ -215,10 +215,9 @@ defer_free(struct nfsd4_compoundargs *ar
static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
{
if (p == argp->tmp) {
- p = kmalloc(nbytes, GFP_KERNEL);
+ p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
if (!p)
return NULL;
- memcpy(p, argp->tmp, nbytes);
} else {
BUG_ON(p != argp->tmpp);
argp->tmpp = NULL;

2011-11-22 20:27:01

by J. Bruce Fields

Subject: Re: [PATCH] nfsd4: Use kmemdup rather than duplicating its implementation

On Thu, Nov 17, 2011 at 11:43:40PM +0100, Thomas Meyer wrote:
> The semantic patch that makes this change is available
> in scripts/coccinelle/api/memdup.cocci.

Thanks, applying for 3.3.--b.

>
> Signed-off-by: Thomas Meyer <[email protected]>
> ---
>
> diff -u -p a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> --- a/fs/nfsd/nfs4state.c 2011-11-07 19:38:23.353822940 +0100
> +++ b/fs/nfsd/nfs4state.c 2011-11-08 10:34:05.545953251 +0100
> @@ -985,12 +985,11 @@ static struct nfs4_client *alloc_client(
> clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
> if (clp == NULL)
> return NULL;
> - clp->cl_name.data = kmalloc(name.len, GFP_KERNEL);
> + clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
> if (clp->cl_name.data == NULL) {
> kfree(clp);
> return NULL;
> }
> - memcpy(clp->cl_name.data, name.data, name.len);
> clp->cl_name.len = name.len;
> return clp;
> }
> diff -u -p a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
> --- a/fs/nfsd/nfs4xdr.c 2011-11-07 19:38:23.357156324 +0100
> +++ b/fs/nfsd/nfs4xdr.c 2011-11-08 10:34:08.289323359 +0100
> @@ -215,10 +215,9 @@ defer_free(struct nfsd4_compoundargs *ar
> static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
> {
> if (p == argp->tmp) {
> - p = kmalloc(nbytes, GFP_KERNEL);
> + p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
> if (!p)
> return NULL;
> - memcpy(p, argp->tmp, nbytes);
> } else {
> BUG_ON(p != argp->tmpp);
> argp->tmpp = NULL;
> --
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