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Message-Id: <1330968804-8098-5-git-send-email-sjenning@linux.vnet.ibm.com> Date: Mon, 5 Mar 2012 11:33:23 -0600 From: Seth Jennings <sjenning@...ux.vnet.ibm.com> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Cc: Seth Jennings <sjenning@...ux.vnet.ibm.com>, Dan Magenheimer <dan.magenheimer@...cle.com>, Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>, Nitin Gupta <ngupta@...are.org>, Robert Jennings <rcj@...ux.vnet.ibm.com>, devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org Subject: [PATCH 4/5] 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@...ux.vnet.ibm.com> --- drivers/staging/zsmalloc/zsmalloc_int.h | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/drivers/staging/zsmalloc/zsmalloc_int.h b/drivers/staging/zsmalloc/zsmalloc_int.h index ffb272f..92eefc6 100644 --- a/drivers/staging/zsmalloc/zsmalloc_int.h +++ b/drivers/staging/zsmalloc/zsmalloc_int.h @@ -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 /* -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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