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authorIngo Molnar <mingo@elte.hu>2009-07-03 17:28:57 +0200
committerIngo Molnar <mingo@elte.hu>2009-07-03 20:23:52 +0200
commit1fde902d52ee13ab9fab155bbae757fdf7daf0c1 (patch)
tree79051f92959ab31aa26d0b13a8cb2b931e77b34a /arch/x86
parentx86: atomic64: Improve atomic64_read() (diff)
downloadlinux-1fde902d52ee13ab9fab155bbae757fdf7daf0c1.tar.xz
linux-1fde902d52ee13ab9fab155bbae757fdf7daf0c1.zip
x86: atomic64: Export APIs to modules
atomic64_t primitives are used by a handful of drivers, so export the APIs consistently. These were inlined before. Also mark atomic64_32.o a core object, so that the symbols are available even if not linked to core kernel pieces. Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: David Howells <dhowells@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> LKML-Reference: <tip-05118ab8859492ac9ddda0154cf90e37b0a4a0b0@git.kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/lib/Makefile2
-rw-r--r--arch/x86/lib/atomic64_32.c18
2 files changed, 19 insertions, 1 deletions
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index c3c657c8bb83..07c31899c9c2 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -10,7 +10,7 @@ lib-y += usercopy_$(BITS).o getuser.o putuser.o
lib-y += memcpy_$(BITS).o
ifeq ($(CONFIG_X86_32),y)
- lib-y += atomic64_32.o
+ obj-y += atomic64_32.o
lib-y += checksum_32.o
lib-y += strstr_32.o
lib-y += semaphore_32.o string_32.o
diff --git a/arch/x86/lib/atomic64_32.c b/arch/x86/lib/atomic64_32.c
index cd11803f9448..6722a092e407 100644
--- a/arch/x86/lib/atomic64_32.c
+++ b/arch/x86/lib/atomic64_32.c
@@ -1,5 +1,7 @@
#include <linux/compiler.h>
+#include <linux/module.h>
#include <linux/types.h>
+
#include <asm/processor.h>
#include <asm/cmpxchg.h>
#include <asm/atomic.h>
@@ -21,6 +23,7 @@ u64 atomic64_cmpxchg(atomic64_t *ptr, u64 old_val, u64 new_val)
{
return cmpxchg8b(&ptr->counter, old_val, new_val);
}
+EXPORT_SYMBOL(atomic64_cmpxchg);
/**
* atomic64_xchg - xchg atomic64 variable
@@ -41,6 +44,7 @@ u64 atomic64_xchg(atomic64_t *ptr, u64 new_val)
return old_val;
}
+EXPORT_SYMBOL(atomic64_xchg);
/**
* atomic64_set - set atomic64 variable
@@ -53,6 +57,7 @@ void atomic64_set(atomic64_t *ptr, u64 new_val)
{
atomic64_xchg(ptr, new_val);
}
+EXPORT_SYMBOL(atomic64_read);
/**
* atomic64_read - read atomic64 variable
@@ -74,6 +79,7 @@ u64 atomic64_read(atomic64_t *ptr)
return res;
}
+EXPORT_SYMBOL(atomic64_read);
/**
* atomic64_add_return - add and return
@@ -103,21 +109,25 @@ noinline u64 atomic64_add_return(u64 delta, atomic64_t *ptr)
return new_val;
}
+EXPORT_SYMBOL(atomic64_add_return);
u64 atomic64_sub_return(u64 delta, atomic64_t *ptr)
{
return atomic64_add_return(-delta, ptr);
}
+EXPORT_SYMBOL(atomic64_sub_return);
u64 atomic64_inc_return(atomic64_t *ptr)
{
return atomic64_add_return(1, ptr);
}
+EXPORT_SYMBOL(atomic64_inc_return);
u64 atomic64_dec_return(atomic64_t *ptr)
{
return atomic64_sub_return(1, ptr);
}
+EXPORT_SYMBOL(atomic64_dec_return);
/**
* atomic64_add - add integer to atomic64 variable
@@ -130,6 +140,7 @@ void atomic64_add(u64 delta, atomic64_t *ptr)
{
atomic64_add_return(delta, ptr);
}
+EXPORT_SYMBOL(atomic64_add);
/**
* atomic64_sub - subtract the atomic64 variable
@@ -142,6 +153,7 @@ void atomic64_sub(u64 delta, atomic64_t *ptr)
{
atomic64_add(-delta, ptr);
}
+EXPORT_SYMBOL(atomic64_sub);
/**
* atomic64_sub_and_test - subtract value from variable and test result
@@ -158,6 +170,7 @@ int atomic64_sub_and_test(u64 delta, atomic64_t *ptr)
return old_val == 0;
}
+EXPORT_SYMBOL(atomic64_sub_and_test);
/**
* atomic64_inc - increment atomic64 variable
@@ -169,6 +182,7 @@ void atomic64_inc(atomic64_t *ptr)
{
atomic64_add(1, ptr);
}
+EXPORT_SYMBOL(atomic64_inc);
/**
* atomic64_dec - decrement atomic64 variable
@@ -180,6 +194,7 @@ void atomic64_dec(atomic64_t *ptr)
{
atomic64_sub(1, ptr);
}
+EXPORT_SYMBOL(atomic64_dec);
/**
* atomic64_dec_and_test - decrement and test
@@ -193,6 +208,7 @@ int atomic64_dec_and_test(atomic64_t *ptr)
{
return atomic64_sub_and_test(1, ptr);
}
+EXPORT_SYMBOL(atomic64_dec_and_test);
/**
* atomic64_inc_and_test - increment and test
@@ -206,6 +222,7 @@ int atomic64_inc_and_test(atomic64_t *ptr)
{
return atomic64_sub_and_test(-1, ptr);
}
+EXPORT_SYMBOL(atomic64_inc_and_test);
/**
* atomic64_add_negative - add and test if negative
@@ -222,3 +239,4 @@ int atomic64_add_negative(u64 delta, atomic64_t *ptr)
return old_val < 0;
}
+EXPORT_SYMBOL(atomic64_add_negative);