linux-kernel - linux-next: build failure after merge of the origin tree

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Date:	Mon, 25 Jul 2011 11:16:27 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jonas Bonn <jonas@...thpole.se>,
	Alan Cox <alan@...ux.intel.com>
Subject: linux-next: build failure after merge of the origin tree

Hi Linus,

After merging the origin tree, today's linux-next build (x86_64
allmodconfig) failed like this:

ERROR: "__bad_udelay" [drivers/staging/gma500/psb_gfx.ko] undefined!

Presumably caused by commit a87e553fabe8 ("asm-generic: delay.h fix
udelay and ndelay for 8 bit args").
drivers/staging/gma500/psb_intel_display.c has a udelay
(20000) which is explicitly disallowed by this patch.

I have added the following patch for today:

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Mon, 25 Jul 2011 11:13:13 +1000
Subject: [PATCH] gma500: udlay(20000) is too large

So we use mdelay(20) instead.  Fixes this build error:

ERROR: "__bad_udelay" [drivers/staging/gma500/psb_gfx.ko] undefined!

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 drivers/staging/gma500/psb_intel_display.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/gma500/psb_intel_display.c b/drivers/staging/gma500/psb_intel_display.c
index 4f47d09..09e378d 100644
--- a/drivers/staging/gma500/psb_intel_display.c
+++ b/drivers/staging/gma500/psb_intel_display.c
@@ -331,7 +331,7 @@ static bool psb_intel_find_best_PLL(struct drm_crtc *crtc, int target,
 void psb_intel_wait_for_vblank(struct drm_device *dev)
 {
 	/* Wait for 20ms, i.e. one cycle at 50hz. */
-	udelay(20000);
+	mdelay(20);
 }
 
 int psb_intel_pipe_set_base(struct drm_crtc *crtc,
-- 
1.7.5.4


-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/
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