Change the signature of PMAP_PREFER from void PMAP_PREFER(..., vaddr_t *) to

vaddr_t PMAP_PREFER(..., vaddr_t). This allows better compiler optimization
when the function is inlined, and avoids accessing memory on architectures
when we can pass function arguments in registers.

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/arch/sparc64/include/pmap.h b/sys/arch/sparc64/include/pmap.h
index 31f48571b9a..e347dc139d9 100644
--- a/sys/arch/sparc64/include/pmap.h
+++ b/sys/arch/sparc64/include/pmap.h
@@ -168,7 +168,7 @@ extern struct pmap kernel_pmap_;
 
 void pmap_bootstrap(u_long, u_long, u_int, u_int);
 /* make sure all page mappings are modulo 16K to prevent d$ aliasing */
-#define PMAP_PREFER(pa, va)	(*(va) += (((*(va)) ^ (pa)) & VA_ALIAS_MASK))
+#define PMAP_PREFER(pa, va)	((va) + (((va) ^ (pa)) & VA_ALIAS_MASK))
 
 #define PMAP_GROWKERNEL         /* turn on pmap_growkernel interface */