Commit b9ed4f6c authored Mar 05, 2012 by Seth Jennings Committed by Greg Kroah-Hartman Mar 07, 2012

staging: zsmalloc: change ZS_MIN_ALLOC_SIZE



This patch ensures that the value of ZS_MIN_ALLOC_SIZE, for the
PAGE_SIZE and MAX_PHYSMEM_BITS on the system, allows for all
possible object ids in the lowest storage class to be encoded
in the object handle.

Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Acked-by: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 6e00ec00

drivers/staging/zsmalloc/zsmalloc_int.h

+3 −1

Original line number	Diff line number	Diff line
		@@ -58,8 +58,10 @@
		#define OBJ_INDEX_BITS (BITS_PER_LONG - _PFN_BITS)
		#define OBJ_INDEX_MASK ((_AC(1, UL) << OBJ_INDEX_BITS) - 1)

		#define MAX(a, b) ((a) >= (b) ? (a) : (b))
		/* ZS_MIN_ALLOC_SIZE must be multiple of ZS_ALIGN */
		#define ZS_MIN_ALLOC_SIZE 32
		#define ZS_MIN_ALLOC_SIZE \
		MAX(32, (ZS_MAX_PAGES_PER_ZSPAGE << PAGE_SHIFT >> OBJ_INDEX_BITS))
		#define ZS_MAX_ALLOC_SIZE PAGE_SIZE

		/*