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authorRoland Dreier <rdreier@cisco.com>2009-07-29 18:04:02 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-07-29 22:10:35 -0400
commit3fc7b4b220c7e830a5b3ce0ea5f85a635e0c50f0 (patch)
treef30750093bda1a0bd233b025f30891bf4010926d /lib
parente4c6f8bed01f9f9a5c607bd689bf67e7b8a36bd8 (diff)
lib: export generic atomic64_t functions
The generic atomic64_t implementation in lib/ did not export the functions it defined, which means that modules that use atomic64_t would not link on platforms (such as 32-bit powerpc). For example, trying to build a kernel with CONFIG_NET_RDS on such a platform would fail with: ERROR: "atomic64_read" [net/rds/rds.ko] undefined! ERROR: "atomic64_set" [net/rds/rds.ko] undefined! Fix this by exporting the atomic64_t functions to modules. (I export the entire API even if it's not all currently used by in-tree modules to avoid having to continue fixing this in dribs and drabs) Signed-off-by: Roland Dreier <rolandd@cisco.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/atomic64.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/atomic64.c b/lib/atomic64.c
index c5e725562416..8bee16ec7524 100644
--- a/lib/atomic64.c
+++ b/lib/atomic64.c
@@ -13,6 +13,7 @@
13#include <linux/cache.h> 13#include <linux/cache.h>
14#include <linux/spinlock.h> 14#include <linux/spinlock.h>
15#include <linux/init.h> 15#include <linux/init.h>
16#include <linux/module.h>
16#include <asm/atomic.h> 17#include <asm/atomic.h>
17 18
18/* 19/*
@@ -52,6 +53,7 @@ long long atomic64_read(const atomic64_t *v)
52 spin_unlock_irqrestore(lock, flags); 53 spin_unlock_irqrestore(lock, flags);
53 return val; 54 return val;
54} 55}
56EXPORT_SYMBOL(atomic64_read);
55 57
56void atomic64_set(atomic64_t *v, long long i) 58void atomic64_set(atomic64_t *v, long long i)
57{ 59{
@@ -62,6 +64,7 @@ void atomic64_set(atomic64_t *v, long long i)
62 v->counter = i; 64 v->counter = i;
63 spin_unlock_irqrestore(lock, flags); 65 spin_unlock_irqrestore(lock, flags);
64} 66}
67EXPORT_SYMBOL(atomic64_set);
65 68
66void atomic64_add(long long a, atomic64_t *v) 69void atomic64_add(long long a, atomic64_t *v)
67{ 70{
@@ -72,6 +75,7 @@ void atomic64_add(long long a, atomic64_t *v)
72 v->counter += a; 75 v->counter += a;
73 spin_unlock_irqrestore(lock, flags); 76 spin_unlock_irqrestore(lock, flags);
74} 77}
78EXPORT_SYMBOL(atomic64_add);
75 79
76long long atomic64_add_return(long long a, atomic64_t *v) 80long long atomic64_add_return(long long a, atomic64_t *v)
77{ 81{
@@ -84,6 +88,7 @@ long long atomic64_add_return(long long a, atomic64_t *v)
84 spin_unlock_irqrestore(lock, flags); 88 spin_unlock_irqrestore(lock, flags);
85 return val; 89 return val;
86} 90}
91EXPORT_SYMBOL(atomic64_add_return);
87 92
88void atomic64_sub(long long a, atomic64_t *v) 93void atomic64_sub(long long a, atomic64_t *v)
89{ 94{
@@ -94,6 +99,7 @@ void atomic64_sub(long long a, atomic64_t *v)
94 v->counter -= a; 99 v->counter -= a;
95 spin_unlock_irqrestore(lock, flags); 100 spin_unlock_irqrestore(lock, flags);
96} 101}
102EXPORT_SYMBOL(atomic64_sub);
97 103
98long long atomic64_sub_return(long long a, atomic64_t *v) 104long long atomic64_sub_return(long long a, atomic64_t *v)
99{ 105{
@@ -106,6 +112,7 @@ long long atomic64_sub_return(long long a, atomic64_t *v)
106 spin_unlock_irqrestore(lock, flags); 112 spin_unlock_irqrestore(lock, flags);
107 return val; 113 return val;
108} 114}
115EXPORT_SYMBOL(atomic64_sub_return);
109 116
110long long atomic64_dec_if_positive(atomic64_t *v) 117long long atomic64_dec_if_positive(atomic64_t *v)
111{ 118{
@@ -120,6 +127,7 @@ long long atomic64_dec_if_positive(atomic64_t *v)
120 spin_unlock_irqrestore(lock, flags); 127 spin_unlock_irqrestore(lock, flags);
121 return val; 128 return val;
122} 129}
130EXPORT_SYMBOL(atomic64_dec_if_positive);
123 131
124long long atomic64_cmpxchg(atomic64_t *v, long long o, long long n) 132long long atomic64_cmpxchg(atomic64_t *v, long long o, long long n)
125{ 133{
@@ -134,6 +142,7 @@ long long atomic64_cmpxchg(atomic64_t *v, long long o, long long n)
134 spin_unlock_irqrestore(lock, flags); 142 spin_unlock_irqrestore(lock, flags);
135 return val; 143 return val;
136} 144}
145EXPORT_SYMBOL(atomic64_cmpxchg);
137 146
138long long atomic64_xchg(atomic64_t *v, long long new) 147long long atomic64_xchg(atomic64_t *v, long long new)
139{ 148{
@@ -147,6 +156,7 @@ long long atomic64_xchg(atomic64_t *v, long long new)
147 spin_unlock_irqrestore(lock, flags); 156 spin_unlock_irqrestore(lock, flags);
148 return val; 157 return val;
149} 158}
159EXPORT_SYMBOL(atomic64_xchg);
150 160
151int atomic64_add_unless(atomic64_t *v, long long a, long long u) 161int atomic64_add_unless(atomic64_t *v, long long a, long long u)
152{ 162{
@@ -162,6 +172,7 @@ int atomic64_add_unless(atomic64_t *v, long long a, long long u)
162 spin_unlock_irqrestore(lock, flags); 172 spin_unlock_irqrestore(lock, flags);
163 return ret; 173 return ret;
164} 174}
175EXPORT_SYMBOL(atomic64_add_unless);
165 176
166static int init_atomic64_lock(void) 177static int init_atomic64_lock(void)
167{ 178{