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lib: export generic atomic64_t functions

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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>
This commit is contained in:
Roland Dreier 2009-07-29 15:04:02 -07:00 committed by Linus Torvalds
parent e4c6f8bed0
commit 3fc7b4b220
1 changed files with 11 additions and 0 deletions
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11
lib/atomic64.c
View file

@ -13,6 +13,7 @@
#include <linux/cache.h> #include <linux/cache.h>
#include <linux/spinlock.h> #include <linux/spinlock.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/module.h>
#include <asm/atomic.h> #include <asm/atomic.h>
/* /*
@ -52,6 +53,7 @@ long long atomic64_read(const atomic64_t *v)
spin_unlock_irqrestore(lock, flags); spin_unlock_irqrestore(lock, flags);
return val; return val;
} }
EXPORT_SYMBOL(atomic64_read);
void atomic64_set(atomic64_t *v, long long i) void atomic64_set(atomic64_t *v, long long i)
{ {
@ -62,6 +64,7 @@ void atomic64_set(atomic64_t *v, long long i)
v->counter = i; v->counter = i;
spin_unlock_irqrestore(lock, flags); spin_unlock_irqrestore(lock, flags);
} }
EXPORT_SYMBOL(atomic64_set);
void atomic64_add(long long a, atomic64_t *v) void atomic64_add(long long a, atomic64_t *v)
{ {
@ -72,6 +75,7 @@ void atomic64_add(long long a, atomic64_t *v)
v->counter += a; v->counter += a;
spin_unlock_irqrestore(lock, flags); spin_unlock_irqrestore(lock, flags);
} }
EXPORT_SYMBOL(atomic64_add);
long long atomic64_add_return(long long a, atomic64_t *v) long long atomic64_add_return(long long a, atomic64_t *v)
{ {
@ -84,6 +88,7 @@ long long atomic64_add_return(long long a, atomic64_t *v)
spin_unlock_irqrestore(lock, flags); spin_unlock_irqrestore(lock, flags);
return val; return val;
} }
EXPORT_SYMBOL(atomic64_add_return);
void atomic64_sub(long long a, atomic64_t *v) void atomic64_sub(long long a, atomic64_t *v)
{ {
@ -94,6 +99,7 @@ void atomic64_sub(long long a, atomic64_t *v)
v->counter -= a; v->counter -= a;
spin_unlock_irqrestore(lock, flags); spin_unlock_irqrestore(lock, flags);
} }
EXPORT_SYMBOL(atomic64_sub);
long long atomic64_sub_return(long long a, atomic64_t *v) long long atomic64_sub_return(long long a, atomic64_t *v)
{ {
@ -106,6 +112,7 @@ long long atomic64_sub_return(long long a, atomic64_t *v)
spin_unlock_irqrestore(lock, flags); spin_unlock_irqrestore(lock, flags);
return val; return val;
} }
EXPORT_SYMBOL(atomic64_sub_return);
long long atomic64_dec_if_positive(atomic64_t *v) long long atomic64_dec_if_positive(atomic64_t *v)
{ {
@ -120,6 +127,7 @@ long long atomic64_dec_if_positive(atomic64_t *v)
spin_unlock_irqrestore(lock, flags); spin_unlock_irqrestore(lock, flags);
return val; return val;
} }
EXPORT_SYMBOL(atomic64_dec_if_positive);
long long atomic64_cmpxchg(atomic64_t *v, long long o, long long n) long long atomic64_cmpxchg(atomic64_t *v, long long o, long long n)
{ {
@ -134,6 +142,7 @@ long long atomic64_cmpxchg(atomic64_t *v, long long o, long long n)
spin_unlock_irqrestore(lock, flags); spin_unlock_irqrestore(lock, flags);
return val; return val;
} }
EXPORT_SYMBOL(atomic64_cmpxchg);
long long atomic64_xchg(atomic64_t *v, long long new) long long atomic64_xchg(atomic64_t *v, long long new)
{ {
@ -147,6 +156,7 @@ long long atomic64_xchg(atomic64_t *v, long long new)
spin_unlock_irqrestore(lock, flags); spin_unlock_irqrestore(lock, flags);
return val; return val;
} }
EXPORT_SYMBOL(atomic64_xchg);
int atomic64_add_unless(atomic64_t *v, long long a, long long u) int atomic64_add_unless(atomic64_t *v, long long a, long long u)
{ {
@ -162,6 +172,7 @@ int atomic64_add_unless(atomic64_t *v, long long a, long long u)
spin_unlock_irqrestore(lock, flags); spin_unlock_irqrestore(lock, flags);
return ret; return ret;
} }
EXPORT_SYMBOL(atomic64_add_unless);
static int init_atomic64_lock(void) static int init_atomic64_lock(void)
{ {