Lots of fixes here:

- Detailed kmem memory allocation tracking.  We can now get on
  spl module unload a list of all memory allocations which were
  not free'd and where the original alloc was.  E.g.

SPL: 15554:632:(spl-kmem.c:442:kmem_fini()) kmem leaked 90/319332 bytes
SPL: 15554:648:(spl-kmem.c:451:kmem_fini()) address          size  data             func:line
SPL: 15554:648:(spl-kmem.c:457:kmem_fini()) ffff8100734b68b8 32    0100000001005a5a __spl_mutex_init:70
SPL: 15554:648:(spl-kmem.c:457:kmem_fini()) ffff8100734b6148 13    &tl->tl_lock     __spl_mutex_init:74
SPL: 15554:648:(spl-kmem.c:457:kmem_fini()) ffff81007ac43730 32    0100000001005a5a __spl_mutex_init:70
SPL: 15554:648:(spl-kmem.c:457:kmem_fini()) ffff81007ac437d8 13    &tl->tl_lock     __spl_mutex_init:74

- Shift to using rwsems in kmem implmentation, to simply locking and
  improve concurency.

- Shift to using rwsems in mutex implementation, additionally ensure we
  never sleep in the init function if non-zero preempt_count or 
  interrupts are disabled as can happen in a slab cache ctor/dtor.

- Other minor formating fixes and such.

TODO:

- Finish the vmem memory allocation tracking

- Vet all other SPL primatives for potential sleeping during *_init.  I
suspect the rwlock implemenation does this and should be fixes just
like the mutex implemenation.



git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@95 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c

modules/splat/splat-internal.h

@@ -138,7 +138,7 @@ typedef struct splat_info {
 #define sym2str(sym)			(char *)(#sym)
 
 #define splat_print(file, format, args...)				\
-({	splat_info_t *_info_ = (splat_info_t *)file->private_data;		\
+({	splat_info_t *_info_ = (splat_info_t *)file->private_data;	\
 	int _rc_;							\
 									\
 	ASSERT(_info_);							\
@@ -160,7 +160,7 @@ typedef struct splat_info {
 	_rc_;								\
 })
 
-#define splat_vprint(file, test, format, args...)				\
+#define splat_vprint(file, test, format, args...)			\
 	splat_print(file, "%*s: " format, SPLAT_NAME_SIZE, test, args)
 
 splat_subsystem_t * splat_condvar_init(void);