Hi all, Friendly ping: who can take this, please? 😄 Thanks -- Gustavo On 3/17/23 14:56, Gustavo A. R. Silva wrote:
Zero-length arrays as fake flexible arrays are deprecated and we are moving towards adopting C99 flexible-array members instead. Address the following warnings found with GCC-13 and -fstrict-flex-arrays=3 enabled: drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.c:266:25: warning: array subscript 0 is outside array bounds of ‘struct mt7921_asar_dyn_limit_v2[0]’ [-Warray-bounds=] drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.c:263:25: warning: array subscript 0 is outside array bounds of ‘struct mt7921_asar_dyn_limit[0]’ [-Warray-bounds=] drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.c:223:28: warning: array subscript <unknown> is outside array bounds of ‘struct mt7921_asar_geo_limit_v2[0]’ [-Warray-bounds=] drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.c:220:28: warning: array subscript <unknown> is outside array bounds of ‘struct mt7921_asar_geo_limit[0]’ [-Warray-bounds=] drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.c:334:37: warning: array subscript i is outside array bounds of ‘u8[0]’ {aka ‘unsigned char[]’} [-Warray-bounds=] Notice that the DECLARE_FLEX_ARRAY() helper allows for flexible-array members in unions. This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines on memcpy() and help us make progress towards globally enabling -fstrict-flex-arrays=3 [1]. Link: https://github.com/KSPP/linux/issues/21 Link: https://github.com/KSPP/linux/issues/272 Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1] Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx> --- drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.h b/drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.h index 35268b0890ad..6f2c4a572572 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.h +++ b/drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.h @@ -24,7 +24,7 @@ struct mt7921_asar_dyn { u8 names[4]; u8 enable; u8 nr_tbl; - struct mt7921_asar_dyn_limit tbl[0]; + DECLARE_FLEX_ARRAY(struct mt7921_asar_dyn_limit, tbl); } __packed;struct mt7921_asar_dyn_limit_v2 {@@ -37,7 +37,7 @@ struct mt7921_asar_dyn_v2 { u8 enable; u8 rsvd; u8 nr_tbl; - struct mt7921_asar_dyn_limit_v2 tbl[0]; + DECLARE_FLEX_ARRAY(struct mt7921_asar_dyn_limit_v2, tbl); } __packed;struct mt7921_asar_geo_band {@@ -55,7 +55,7 @@ struct mt7921_asar_geo { u8 names[4]; u8 version; u8 nr_tbl; - struct mt7921_asar_geo_limit tbl[0]; + DECLARE_FLEX_ARRAY(struct mt7921_asar_geo_limit, tbl); } __packed;struct mt7921_asar_geo_limit_v2 {@@ -69,7 +69,7 @@ struct mt7921_asar_geo_v2 { u8 version; u8 rsvd; u8 nr_tbl; - struct mt7921_asar_geo_limit_v2 tbl[0]; + DECLARE_FLEX_ARRAY(struct mt7921_asar_geo_limit_v2, tbl); } __packed;struct mt7921_asar_cl {@@ -85,7 +85,7 @@ struct mt7921_asar_fg { u8 rsvd; u8 nr_flag; u8 rsvd1; - u8 flag[0]; + u8 flag[]; } __packed;struct mt7921_acpi_sar {
