From ed61a7d05eb95ab453a95baf52d6af7b0c60a132 Mon Sep 17 00:00:00 2001
From: behlendo <behlendo@7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c>
Date: Thu, 6 Mar 2008 23:42:37 +0000
Subject: Add some missing rw_lock symbols

git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@27 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
---
 include/sys/rwlock.h     | 12 ++++++++----
 include/sys/sysmacros.h  |  2 ++
 modules/spl/spl-rwlock.c | 23 +++++++++++++----------
 3 files changed, 23 insertions(+), 14 deletions(-)

diff --git a/include/sys/rwlock.h b/include/sys/rwlock.h
index 6c55ced98..4498e9562 100644
--- a/include/sys/rwlock.h
+++ b/include/sys/rwlock.h
@@ -21,10 +21,10 @@ typedef enum {
 	RW_READER
 } krw_t;
 
-#define RW_READ_HELD(x)         (rw_read_held((x)))
-#define RW_WRITE_HELD(x)        (rw_write_held((x)))
-#define RW_LOCK_HELD(x)         (rw_lock_held((x)))
-#define RW_ISWRITER(x)          (rw_iswriter(x))
+#define RW_READ_HELD(x)         (__rw_read_held((x)))
+#define RW_WRITE_HELD(x)        (__rw_write_held((x)))
+#define RW_LOCK_HELD(x)         (__rw_lock_held((x)))
+#define RW_ISWRITER(x)          (__rw_iswriter(x))
 
 #define RW_MAGIC  0x3423645a
 #define RW_POISON 0xa6
@@ -36,6 +36,10 @@ typedef struct {
 	struct task_struct *rw_owner;	/* holder of the write lock */
 } krwlock_t;
 
+extern int __rw_read_held(krwlock_t *rwlp);
+extern int __rw_write_held(krwlock_t *rwlp);
+extern int __rw_lock_held(krwlock_t *rwlp);
+
 static __inline__ void
 rw_init(krwlock_t *rwlp, char *name, krw_type_t type, void *arg)
 {
diff --git a/include/sys/sysmacros.h b/include/sys/sysmacros.h
index 1927a060d..2c3ec0e4e 100644
--- a/include/sys/sysmacros.h
+++ b/include/sys/sysmacros.h
@@ -13,6 +13,8 @@ extern "C" {
 
 /* Missing defines.
  */
+#define FALSE				0
+#define TRUE				1
 #define INT32_MAX                       INT_MAX
 #define UINT64_MAX                      (~0ULL)
 #define NBBY                            8
diff --git a/modules/spl/spl-rwlock.c b/modules/spl/spl-rwlock.c
index d74d89e24..fa78d4c14 100644
--- a/modules/spl/spl-rwlock.c
+++ b/modules/spl/spl-rwlock.c
@@ -1,41 +1,44 @@
 #include <sys/rwlock.h>
 
 int
-rw_lock_held(krwlock_t *rwlp)
+__rw_read_held(krwlock_t *rwlp)
 {
 	BUG_ON(rwlp->rw_magic != RW_MAGIC);
 
-#ifdef CONFIG_RWSEM_GENERIC_SPINLOCK
-	if (rwlp->rw_sem.activity != 0) {
-#else
-	if (rwlp->rw_sem.count != 0) {
-#endif
+	if (__rw_lock_held(rwlp) && rwlp->rw_owner == NULL) {
 		return 1;
 	}
 
 	return 0;
 }
+EXPORT_SYMBOL(__rw_read_held);
 
 int
-rw_read_held(krwlock_t *rwlp)
+__rw_write_held(krwlock_t *rwlp)
 {
 	BUG_ON(rwlp->rw_magic != RW_MAGIC);
 
-	if (rw_lock_held(rwlp) && rwlp->rw_owner == NULL) {
+	if (rwlp->rw_owner == current) {
 		return 1;
 	}
 
 	return 0;
 }
+EXPORT_SYMBOL(__rw_write_held);
 
 int
-rw_write_held(krwlock_t *rwlp)
+__rw_lock_held(krwlock_t *rwlp)
 {
 	BUG_ON(rwlp->rw_magic != RW_MAGIC);
 
-	if (rwlp->rw_owner == current) {
+#ifdef CONFIG_RWSEM_GENERIC_SPINLOCK
+	if (rwlp->rw_sem.activity != 0) {
+#else
+	if (rwlp->rw_sem.count != 0) {
+#endif
 		return 1;
 	}
 
 	return 0;
 }
+EXPORT_SYMBOL(__rw_lock_held);
-- 
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