#ifndef _ASM_GENERIC_LOCAL64_H #define _ASM_GENERIC_LOCAL64_H #include #include /* * A signed long type for operations which are atomic for a single CPU. * Usually used in combination with per-cpu variables. * * This is the default implementation, which uses atomic64_t. Which is * rather pointless. The whole point behind local64_t is that some processors * can perform atomic adds and subtracts in a manner which is atomic wrt IRQs * running on this CPU. local64_t allows exploitation of such capabilities. */ /* Implement in terms of atomics. */ #if BITS_PER_LONG == 64 #include typedef struct { local_t a; } local64_t; #define LOCAL64_INIT(i) { LOCAL_INIT(i) } #define local64_read(l) local_read(&(l)->a) #define local64_set(l,i) local_set((&(l)->a),(i)) #define local64_inc(l) local_inc(&(l)->a) #define local64_dec(l) local_dec(&(l)->a) #define local64_add(i,l) local_add((i),(&(l)->a)) #define local64_sub(i,l) local_sub((i),(&(l)->a)) #define local64_sub_and_test(i, l) local_sub_and_test((i), (&(l)->a)) #define local64_dec_and_test(l) local_dec_and_test(&(l)->a) #define local64_inc_and_test(l) local_inc_and_test(&(l)->a) #define local64_add_negative(i, l) local_add_negative((i), (&(l)->a)) #define local64_add_return(i, l) local_add_return((i), (&(l)->a)) #define local64_sub_return(i, l) local_sub_return((i), (&(l)->a)) #define local64_inc_return(l) local_inc_return(&(l)->a) #define local64_cmpxchg(l, o, n) local_cmpxchg((&(l)->a), (o), (n)) #define local64_xchg(l, n) local_xchg((&(l)->a), (n)) #define local64_add_unless(l, _a, u) local_add_unless((&(l)->a), (_a), (u)) #define local64_inc_not_zero(l) local_inc_not_zero(&(l)->a) /* Non-atomic variants, ie. preemption disabled and won't be touched * in interrupt, etc. Some archs can optimize this case well. */ #define __local64_inc(l) local64_set((l), local64_read(l) + 1) #define __local64_dec(l) local64_set((l), local64_read(l) - 1) #define __local64_add(i,l) local64_set((l), local64_read(l) + (i)) #define __local64_sub(i,l) local64_set((l), local64_read(l) - (i)) #else /* BITS_PER_LONG != 64 */ #include /* Don't use typedef: don't want them to be mixed with atomic_t's. */ typedef struct { atomic64_t a; } local64_t; #define LOCAL64_INIT(i) { ATOMIC_LONG_INIT(i) } #define local64_read(l) atomic64_read(&(l)->a) #define local64_set(l,i) atomic64_set((&(l)->a),(i)) #define local64_inc(l) atomic64_inc(&(l)->a) #define local64_dec(l) atomic64_dec(&(l)->a) #define local64_add(i,l) atomic64_add((i),(&(l)->a)) #define local64_sub(i,l) atomic64_sub((i),(&(l)->a)) #define local64_sub_and_test(i, l) atomic64_sub_and_test((i), (&(l)->a)) #define local64_dec_and_test(l) atomic64_dec_and_test(&(l)->a) #define local64_inc_and_test(l) atomic64_inc_and_test(&(l)->a) #define local64_add_negative(i, l) atomic64_add_negative((i), (&(l)->a)) #define local64_add_return(i, l) atomic64_add_return((i), (&(l)->a)) #define local64_sub_return(i, l) atomic64_sub_return((i), (&(l)->a)) #define local64_inc_return(l) atomic64_inc_return(&(l)->a) #define local64_cmpxchg(l, o, n) atomic64_cmpxchg((&(l)->a), (o), (n)) #define local64_xchg(l, n) atomic64_xchg((&(l)->a), (n)) #define local64_add_unless(l, _a, u) atomic64_add_unless((&(l)->a), (_a), (u)) #define local64_inc_not_zero(l) atomic64_inc_not_zero(&(l)->a) /* Non-atomic variants, ie. preemption disabled and won't be touched * in interrupt, etc. Some archs can optimize this case well. */ #define __local64_inc(l) local64_set((l), local64_read(l) + 1) #define __local64_dec(l) local64_set((l), local64_read(l) - 1) #define __local64_add(i,l) local64_set((l), local64_read(l) + (i)) #define __local64_sub(i,l) local64_set((l), local64_read(l) - (i)) #endif /* BITS_PER_LONG != 64 */ #endif /* _ASM_GENERIC_LOCAL64_H */ td class='label'>mode:
authorDavid S. Miller <davem@davemloft.net>2017-02-01 11:22:38 -0500
committerDavid S. Miller <davem@davemloft.net>2017-02-01 11:22:38 -0500
commit04cdf13e34e912dcab9a94f391e15b2c26dfd0a2 (patch)
tree0f0dcf018d5ce2298ed98ec854d6592370a4348a /include
parent624374a56419c2d6d428c862f32cc1b20519095d (diff)
parent1995876a06bcf6f9f7d7b699bdbf387831679771 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
Steffen Klassert says: ==================== pull request (net-next): ipsec-next 2017-02-01 1) Some typo fixes, from Alexander Alemayhu. 2) Don't acquire state lock in get_mtu functions. The only rece against a dead state does not matter. From Florian Westphal. 3) Remove xfrm4_state_fini, it is unused for more than 10 years. From Florian Westphal. 4) Various rcu usage improvements. From Florian Westphal. 5) Properly handle crypto arrors in ah4/ah6. From Gilad Ben-Yossef. 6) Try to avoid skb linearization in esp4 and esp6. 7) The esp trailer is now set up in different places, add a helper for this. 8) With the upcomming usage of gro_cells in IPsec, a gro merged skb can have a secpath. Drop it before freeing or reusing the skb. 9) Add a xfrm dummy network device for napi. With this we can use gro_cells from within xfrm, it allows IPsec GRO without impact on the generic networking code. Please pull or let me know if there are problems. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/xfrm.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h