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bitops: Provide generic sign_extend32 function

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This patch moves code out from wireless drivers where two different
functions are defined in three code locations for the same purpose and
provides a common function to sign extend a 32-bit value.

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Andreas Herrmann
2010-08-30 19:04:01 +00:00
committed by John W. Linville
parent e4b3fdb800
commit 7919a57bc6
7 changed files with 30 additions and 47 deletions
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8
drivers/net/wireless/ath/ath5k/phy.c
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@@ -1102,18 +1102,12 @@ int ath5k_hw_channel(struct ath5k_hw *ah, struct ieee80211_channel *channel)
PHY calibration
\*****************/
static int sign_extend(int val, const int nbits)
{
int order = BIT(nbits-1);
return (val ^ order) - order;
}
static s32 ath5k_hw_read_measured_noise_floor(struct ath5k_hw *ah)
{
s32 val;
val = ath5k_hw_reg_read(ah, AR5K_PHY_NF);
return sign_extend(AR5K_REG_MS(val, AR5K_PHY_NF_MINCCA_PWR), 9);
return sign_extend32(AR5K_REG_MS(val, AR5K_PHY_NF_MINCCA_PWR), 8);
}
void ath5k_hw_init_nfcal_hist(struct ath5k_hw *ah)