diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-05-11 13:59:11 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-05-11 16:59:16 -0700 |
| commit | 0462b6bdb6445b887b8896f28be92e0d94c92e7b (patch) | |
| tree | 9d4b3f468d481aa66b31e5cdb6ad532458889c4d /include/linux/socket.h | |
| parent | 3242956bd610af40e884b530b6c6f76f5bf85f3b (diff) | |
net: add a CMSG_USER_DATA macro
Add a variant of CMSG_DATA that operates on user pointer to avoid
sparse warnings about casting to/from user pointers. Also fix up
CMSG_DATA to rely on the gcc extension that allows void pointer
arithmetics to cut down on the amount of casts.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/socket.h')
| -rw-r--r-- | include/linux/socket.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/socket.h b/include/linux/socket.h index 54338fac45cb..4cc64d611cf4 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -94,7 +94,10 @@ struct cmsghdr { #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) ) -#define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + sizeof(struct cmsghdr))) +#define CMSG_DATA(cmsg) \ + ((void *)(cmsg) + sizeof(struct cmsghdr)) +#define CMSG_USER_DATA(cmsg) \ + ((void __user *)(cmsg) + sizeof(struct cmsghdr)) #define CMSG_SPACE(len) (sizeof(struct cmsghdr) + CMSG_ALIGN(len)) #define CMSG_LEN(len) (sizeof(struct cmsghdr) + (len)) |