Re: linux-next: Tree for July 2 (crypto/hifn_795x)

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Quoting Randy Dunlap <rdunlap@xxxxxxxxxxxx>:

On 07/02/2012 12:23 AM, Stephen Rothwell wrote:

Hi all,

Changes since 20120629:



on i386:


ERROR: "__divdi3" [drivers/crypto/hifn_795x.ko] undefined!


This is caused by commit feb7b7ab928afa97a79a9c424e4e0691f49d63be. hifn_795x has "DIV_ROUND_UP(NSEC_PER_SEC, dev->pk_clk_freq)", which should be changed to DIV_ROUND_UP_ULL now that NSEC_PER_SEC is 64bit on 32bit archs. Patch to fix hifn_795x is attached (only compile tested).

-Jussi

crypto: hifn_795x - fix 64bit division and undefined __divdi3 on 32bit archs

From: Jussi Kivilinna <jussi.kivilinna@xxxxxxxx>

Commit feb7b7ab928afa97a79a9c424e4e0691f49d63be changed NSEC_PER_SEC to 64-bit
constant, which causes "DIV_ROUND_UP(NSEC_PER_SEC, dev->pk_clk_freq)" to
generate __divdi3 call on 32-bit archs. Fix this by changing DIV_ROUND_UP to
DIV_ROUND_UP_ULL.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@xxxxxxxx>
---
 drivers/crypto/hifn_795x.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c
index c9c4bef..df14358 100644
--- a/drivers/crypto/hifn_795x.c
+++ b/drivers/crypto/hifn_795x.c
@@ -821,8 +821,8 @@ static int hifn_register_rng(struct hifn_device *dev)
 	/*
 	 * We must wait at least 256 Pk_clk cycles between two reads of the rng.
 	 */
-	dev->rng_wait_time	= DIV_ROUND_UP(NSEC_PER_SEC, dev->pk_clk_freq) *
-				  256;
+	dev->rng_wait_time	= DIV_ROUND_UP_ULL(NSEC_PER_SEC,
+						   dev->pk_clk_freq) * 256;
 
 	dev->rng.name		= dev->name;
 	dev->rng.data_present	= hifn_rng_data_present,

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