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| author | Eric Dumazet <edumazet@google.com> | 2023-09-15 21:21:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-19 13:27:58 +0300 |
| commit | 5f7676fdaf4242607160cff87576bfb5c505a042 (patch) | |
| tree | 69aa24bb72f1d59cc8df0a886e6bf767fd12b8ac /include | |
| parent | 8b4d0f3890c89d7c7b670c83e6b40308122e7c56 (diff) | |
| download | linux-5f7676fdaf4242607160cff87576bfb5c505a042.tar.xz | |
net: add SKB_HEAD_ALIGN() helper
commit 115f1a5c42bdad9a9ea356fc0b4a39ec7537947f upstream.
We have many places using this expression:
SKB_DATA_ALIGN(sizeof(struct skb_shared_info))
Use of SKB_HEAD_ALIGN() will allow to clean them.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
[Ajay: Regenerated the patch for v6.1.y]
Signed-off-by: Ajay Kaher <akaher@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/skbuff.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index cc5ed2cf25f6..2feee144fc0e 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -261,6 +261,14 @@ #define SKB_DATA_ALIGN(X) ALIGN(X, SMP_CACHE_BYTES) #define SKB_WITH_OVERHEAD(X) \ ((X) - SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) + +/* For X bytes available in skb->head, what is the minimal + * allocation needed, knowing struct skb_shared_info needs + * to be aligned. + */ +#define SKB_HEAD_ALIGN(X) (SKB_DATA_ALIGN(X) + \ + SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) + #define SKB_MAX_ORDER(X, ORDER) \ SKB_WITH_OVERHEAD((PAGE_SIZE << (ORDER)) - (X)) #define SKB_MAX_HEAD(X) (SKB_MAX_ORDER((X), 0)) |