On 02. 06. 23, 6:36, Shiji Yang wrote:
From: Shiji Yang <yangshiji66@xxxxxx>
Add a struct_group to around all members in struct ath_cycle_counters.
It can help the compiler detect the intended bounds of the memcpy() and
memset().
This patch fixes the following build warning:
In function 'fortify_memset_chk',
inlined from 'ath9k_ps_wakeup' at drivers/net/wireless/ath/ath9k/main.c:140:3:
./include/linux/fortify-string.h:314:25: error: call to '__write_overflow_field' declared with attribute warning:
detected write beyond size of field (1st parameter); maybe use struct_group()? [-Werror=attribute-warning]
314 | __write_overflow_field(p_size_field, size);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Hi,
what compiler/version is this with?
Signed-off-by: Shiji Yang <yangshiji66@xxxxxx>
---
More discussion on: https://github.com/openwrt/openwrt/pull/12764
No "__write_overflow_field" there. Is this the right link?
---
drivers/net/wireless/ath/ath.h | 10 ++++++----
drivers/net/wireless/ath/ath5k/ani.c | 2 +-
drivers/net/wireless/ath/ath5k/base.c | 4 ++--
drivers/net/wireless/ath/ath5k/mac80211-ops.c | 2 +-
drivers/net/wireless/ath/ath9k/link.c | 2 +-
drivers/net/wireless/ath/ath9k/main.c | 4 ++--
drivers/net/wireless/ath/hw.c | 2 +-
7 files changed, 14 insertions(+), 12 deletions(-)
diff --git a/drivers/net/wireless/ath/ath.h b/drivers/net/wireless/ath/ath.h
index f02a308a9..4b42e401a 100644
--- a/drivers/net/wireless/ath/ath.h
+++ b/drivers/net/wireless/ath/ath.h
@@ -43,10 +43,12 @@ struct ath_ani {
};
struct ath_cycle_counters {
- u32 cycles;
- u32 rx_busy;
- u32 rx_frame;
- u32 tx_frame;
+ struct_group(cnts,
+ u32 cycles;
+ u32 rx_busy;
+ u32 rx_frame;
+ u32 tx_frame;
+ );
This is horrid.
};
enum ath_device_state {
diff --git a/drivers/net/wireless/ath/ath5k/ani.c b/drivers/net/wireless/ath/ath5k/ani.c
index 850c608b4..fa95f0f0f 100644
--- a/drivers/net/wireless/ath/ath5k/ani.c
+++ b/drivers/net/wireless/ath/ath5k/ani.c
@@ -379,7 +379,7 @@ ath5k_hw_ani_get_listen_time(struct ath5k_hw *ah, struct ath5k_ani_state *as)
spin_lock_bh(&common->cc_lock);
ath_hw_cycle_counters_update(common);
- memcpy(&as->last_cc, &common->cc_ani, sizeof(as->last_cc));
+ memcpy(&as->last_cc.cnts, &common->cc_ani.cnts, sizeof(as->last_cc.cnts));
So is this.
Care to elaborate why this is needed at all, provided we copy/zero a
whole structure? And describe it in the commit log, not in random
external sources.
thanks,
--
js
suse labs
