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NFSD: Use struct_size() helper in alloc_session() 

Use struct_size() helper to simplify the code, no functional changes.

Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Xiu Jianfeng 2022-11-11 17:18:35 +08:00 committed by Chuck Lever
parent 01d53a88c0
commit 85a0d0c9a5
1 changed files with 4 additions and 5 deletions
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9
fs/nfsd/nfs4state.c
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@ -1833,13 +1833,12 @@ static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
int numslots = fattrs->maxreqs;
int slotsize = slot_bytes(fattrs);
struct nfsd4_session *new;
int mem, i;
int i;
BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
+ sizeof(struct nfsd4_session) > PAGE_SIZE);
mem = numslots * sizeof(struct nfsd4_slot *);
BUILD_BUG_ON(struct_size(new, se_slots, NFSD_MAX_SLOTS_PER_SESSION)
> PAGE_SIZE);
new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
new = kzalloc(struct_size(new, se_slots, numslots), GFP_KERNEL);
if (!new)
return NULL;
/* allocate each struct nfsd4_slot and data cache in one piece */