From: Adrian Bunk <bunk@kernel.org>
Date: Tue, 5 Aug 2008 19:06:51 +0000 (+0300)
Subject: ath9k: work around gcc ICEs
X-Git-Tag: v2.6.27-rc3~69^2~5^2~6
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b08cbcd4546445740c2a04291204b56f8baf7be2;p=linux-2.6

ath9k: work around gcc ICEs

This patch works around an internal compiler error (gcc bug #37014) in
all gcc 4.2 compilers and the gcc 4.3 series up to at least 4.3.1
on at least powerpc and mips.

Many thanks to Andrew Pinski for analyzing the gcc bug.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/ath9k/hw.c b/drivers/net/wireless/ath9k/hw.c
index 1f6f3934d3..63d0ead1c4 100644
--- a/drivers/net/wireless/ath9k/hw.c
+++ b/drivers/net/wireless/ath9k/hw.c
@@ -4801,7 +4801,11 @@ static void ath9k_hw_9280_spur_mitigate(struct ath_hal *ah,
 
 	for (i = 0; i < 123; i++) {
 		if ((cur_vit_mask > lower) && (cur_vit_mask < upper)) {
-			if ((abs(cur_vit_mask - bin)) < 75)
+
+			/* workaround for gcc bug #37014 */
+			volatile int tmp = abs(cur_vit_mask - bin);
+
+			if (tmp < 75)
 				mask_amt = 1;
 			else
 				mask_amt = 0;