svn commit: r350569 - head/sys/powerpc/powerpc

[Justin Hibbits]

Author: jhibbits
Date: Sun Aug  4 19:25:23 2019
New Revision: 350569
URL: https://svnweb.freebsd.org/changeset/base/350569

Log:
  powerpc: Enable the BUS_DMA_NOCACHE flag handling
  
  The flag handling was committed commented out 7 years ago.  It works, and is
  needed for LinuxKPI-based DRM drivers.
  
  Also mark a local as potentially unusable, as it's only really used when KTR
  is enabled.
  
  Submitted by:	mmacy

Modified:
  head/sys/powerpc/powerpc/busdma_machdep.c

Modified: head/sys/powerpc/powerpc/busdma_machdep.c
==============================================================================
--- head/sys/powerpc/powerpc/busdma_machdep.c	Sun Aug  4 12:47:38 2019	(r350568)
+++ head/sys/powerpc/powerpc/busdma_machdep.c	Sun Aug  4 19:25:23 2019	(r350569)
@@ -350,7 +350,7 @@ bus_dma_tag_set_domain(bus_dma_tag_t dmat, int domain)
 int
 bus_dma_tag_destroy(bus_dma_tag_t dmat)
 {
-	bus_dma_tag_t dmat_copy;
+	bus_dma_tag_t dmat_copy __unused;
 	int error;
 
 	error = 0;
@@ -515,11 +515,9 @@ bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int
 
 	if (flags & BUS_DMA_ZERO)
 		mflags |= M_ZERO;
-#ifdef NOTYET
 	if (flags & BUS_DMA_NOCACHE)
 		attr = VM_MEMATTR_UNCACHEABLE;
 	else
-#endif
 		attr = VM_MEMATTR_DEFAULT;
 
 	/*