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net: tso: inline tso_count_descs()
tso_count_descs() is a small function doing simple calculation,
and tso_count_descs() is used in fast path, so inline it to
reduce the overhead of calls.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Link: https://lore.kernel.org/r/20221212032426.16050-1-linyunsheng@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
authored by
Yunsheng Lin
and committed by
Jakub Kicinski
d7b061b8
8f18655c
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include/net/tso.h
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include/net/tso.h
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#ifndef _TSO_H
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#define _TSO_H
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#include <linux/skbuff.h>
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#include <net/ip.h>
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#define TSO_HEADER_SIZE 256
···
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u32 tcp_seq;
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};
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int tso_count_descs(const struct sk_buff *skb);
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/* Calculate the worst case buffer count */
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static inline int tso_count_descs(const struct sk_buff *skb)
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{
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return skb_shinfo(skb)->gso_segs * 2 + skb_shinfo(skb)->nr_frags;
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}
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void tso_build_hdr(const struct sk_buff *skb, char *hdr, struct tso_t *tso,
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int size, bool is_last);
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void tso_build_data(const struct sk_buff *skb, struct tso_t *tso, int size);
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net/core/tso.c
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net/core/tso.c
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#include <net/tso.h>
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#include <asm/unaligned.h>
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/* Calculate expected number of TX descriptors */
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int tso_count_descs(const struct sk_buff *skb)
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{
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/* The Marvell Way */
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return skb_shinfo(skb)->gso_segs * 2 + skb_shinfo(skb)->nr_frags;
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}
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EXPORT_SYMBOL(tso_count_descs);
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void tso_build_hdr(const struct sk_buff *skb, char *hdr, struct tso_t *tso,
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int size, bool is_last)
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{