ath9k: work around gcc ICEs (again)

(I missed the fact that the original post said to apply this patch
twice... -- JWL)

Original commit log message:

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 bde162f..a17eb13 100644 (file)
--- a/drivers/net/wireless/ath9k/hw.c
+++ b/drivers/net/wireless/ath9k/hw.c
@@ -5017,7 +5017,11 @@ static void ath9k_hw_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;