| Message ID | 20190424160823.GA20314@embeddedor |
|---|---|
| State | Accepted |
| Delegated to: | David Miller |
| Headers | show |
| Series | [net-next] amd-xgbe: Mark expected switch fall-throughs | expand |
On 4/24/19 11:08 AM, Gustavo A. R. Silva wrote: > In preparation to enabling -Wimplicit-fallthrough, mark switch > cases where we are expecting to fall through. > > This patch fixes the following warnings: > > In file included from drivers/net/ethernet/amd/xgbe/xgbe-drv.c:129: > drivers/net/ethernet/amd/xgbe/xgbe-drv.c: In function ‘xgbe_set_hwtstamp_settings’: > drivers/net/ethernet/amd/xgbe/xgbe-common.h:1392:9: warning: this statement may fall through [-Wimplicit-fallthrough=] > (_var) |= (((_val) & ((0x1 << (_width)) - 1)) << (_index)); \ > ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > drivers/net/ethernet/amd/xgbe/xgbe-common.h:1419:2: note: in expansion of macro ‘SET_BITS’ > SET_BITS((_var), \ > ^~~~~~~~ > drivers/net/ethernet/amd/xgbe/xgbe-drv.c:1614:3: note: in expansion of macro ‘XGMAC_SET_BITS’ > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); > ^~~~~~~~~~~~~~ > drivers/net/ethernet/amd/xgbe/xgbe-drv.c:1616:2: note: here > case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: > ^~~~ > In file included from drivers/net/ethernet/amd/xgbe/xgbe-drv.c:129: > drivers/net/ethernet/amd/xgbe/xgbe-common.h:1392:9: warning: this statement may fall through [-Wimplicit-fallthrough=] > (_var) |= (((_val) & ((0x1 << (_width)) - 1)) << (_index)); \ > ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > drivers/net/ethernet/amd/xgbe/xgbe-common.h:1419:2: note: in expansion of macro ‘SET_BITS’ > SET_BITS((_var), \ > ^~~~~~~~ > drivers/net/ethernet/amd/xgbe/xgbe-drv.c:1625:3: note: in expansion of macro ‘XGMAC_SET_BITS’ > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); > ^~~~~~~~~~~~~~ > drivers/net/ethernet/amd/xgbe/xgbe-drv.c:1627:2: note: here > case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: > ^~~~ > In file included from drivers/net/ethernet/amd/xgbe/xgbe-drv.c:129: > drivers/net/ethernet/amd/xgbe/xgbe-common.h:1392:9: warning: this statement may fall through [-Wimplicit-fallthrough=] > (_var) |= (((_val) & ((0x1 << (_width)) - 1)) << (_index)); \ > ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > drivers/net/ethernet/amd/xgbe/xgbe-common.h:1419:2: note: in expansion of macro ‘SET_BITS’ > SET_BITS((_var), \ > ^~~~~~~~ > drivers/net/ethernet/amd/xgbe/xgbe-drv.c:1636:3: note: in expansion of macro ‘XGMAC_SET_BITS’ > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); > ^~~~~~~~~~~~~~ > drivers/net/ethernet/amd/xgbe/xgbe-drv.c:1638:2: note: here > case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: > ^~~~ > > Warning level 3 was used: -Wimplicit-fallthrough=3 > > Notice that, in this particular case, the code comments are modified > in accordance with what GCC is expecting to find. > > This patch is part of the ongoing efforts to enable > -Wimplicit-fallthrough. > > Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> > --- > drivers/net/ethernet/amd/xgbe/xgbe-drv.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c > index 0cc911f928b1..3dd0cecddba8 100644 > --- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c > +++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c > @@ -1612,7 +1612,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, > /* PTP v2, UDP, any kind of event packet */ > case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); > - /* PTP v1, UDP, any kind of event packet */ > + /* Fall through - to PTP v1, UDP, any kind of event packet */ If the compiler doesn't have a problem with adding just an indented "Fall through" comment and leaving the original comment in place, I would prefer that. It seems clearer to me. Thanks, Tom > case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); > @@ -1623,7 +1623,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, > /* PTP v2, UDP, Sync packet */ > case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); > - /* PTP v1, UDP, Sync packet */ > + /* Fall through - to PTP v1, UDP, Sync packet */ > case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); > @@ -1634,7 +1634,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, > /* PTP v2, UDP, Delay_req packet */ > case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); > - /* PTP v1, UDP, Delay_req packet */ > + /* Fall through - to PTP v1, UDP, Delay_req packet */ > case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); >
Hi, On 4/25/19 8:12 AM, Lendacky, Thomas wrote: [..] >> ^~~~ >> >> Warning level 3 was used: -Wimplicit-fallthrough=3 >> >> Notice that, in this particular case, the code comments are modified >> in accordance with what GCC is expecting to find. >> >> This patch is part of the ongoing efforts to enable >> -Wimplicit-fallthrough. >> >> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> >> --- >> drivers/net/ethernet/amd/xgbe/xgbe-drv.c | 6 +++--- >> 1 file changed, 3 insertions(+), 3 deletions(-) >> >> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c >> index 0cc911f928b1..3dd0cecddba8 100644 >> --- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c >> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c >> @@ -1612,7 +1612,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, >> /* PTP v2, UDP, any kind of event packet */ >> case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: >> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); >> - /* PTP v1, UDP, any kind of event packet */ >> + /* Fall through - to PTP v1, UDP, any kind of event packet */ > > If the compiler doesn't have a problem with adding just an indented > "Fall through" comment and leaving the original comment in place, I would > prefer that. It seems clearer to me. > This is the other alternative: diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c index 0cc911f928b1..f913bf404baa 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c @@ -1613,6 +1613,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); /* PTP v1, UDP, any kind of event packet */ + /* Fall through */ case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); @@ -1624,6 +1625,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); /* PTP v1, UDP, Sync packet */ + /* Fall through */ case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); @@ -1635,6 +1637,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); /* PTP v1, UDP, Delay_req packet */ + /* Fall through */ case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); The thing is that the fall-through comments have to be placed at the very bottom of each case. Which do you prefer? Thanks -- Gustavo > Thanks, > Tom > >> case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: >> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); >> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); >> @@ -1623,7 +1623,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, >> /* PTP v2, UDP, Sync packet */ >> case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: >> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); >> - /* PTP v1, UDP, Sync packet */ >> + /* Fall through - to PTP v1, UDP, Sync packet */ >> case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: >> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); >> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); >> @@ -1634,7 +1634,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, >> /* PTP v2, UDP, Delay_req packet */ >> case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: >> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); >> - /* PTP v1, UDP, Delay_req packet */ >> + /* Fall through - to PTP v1, UDP, Delay_req packet */ >> case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: >> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); >> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); >>
On 4/25/19 9:54 AM, Gustavo A. R. Silva wrote: > Hi, > > On 4/25/19 8:12 AM, Lendacky, Thomas wrote: > [..] >>> ^~~~ >>> >>> Warning level 3 was used: -Wimplicit-fallthrough=3 >>> >>> Notice that, in this particular case, the code comments are modified >>> in accordance with what GCC is expecting to find. >>> >>> This patch is part of the ongoing efforts to enable >>> -Wimplicit-fallthrough. >>> >>> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> >>> --- >>> drivers/net/ethernet/amd/xgbe/xgbe-drv.c | 6 +++--- >>> 1 file changed, 3 insertions(+), 3 deletions(-) >>> >>> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c >>> index 0cc911f928b1..3dd0cecddba8 100644 >>> --- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c >>> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c >>> @@ -1612,7 +1612,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, >>> /* PTP v2, UDP, any kind of event packet */ >>> case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: >>> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); >>> - /* PTP v1, UDP, any kind of event packet */ >>> + /* Fall through - to PTP v1, UDP, any kind of event packet */ >> >> If the compiler doesn't have a problem with adding just an indented >> "Fall through" comment and leaving the original comment in place, I would >> prefer that. It seems clearer to me. >> > > This is the other alternative: > > diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c > index 0cc911f928b1..f913bf404baa 100644 > --- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c > +++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c > @@ -1613,6 +1613,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, > case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); > /* PTP v1, UDP, any kind of event packet */ > + /* Fall through */ > case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); > @@ -1624,6 +1625,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, > case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); > /* PTP v1, UDP, Sync packet */ > + /* Fall through */ > case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); > @@ -1635,6 +1637,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, > case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); > /* PTP v1, UDP, Delay_req packet */ > + /* Fall through */ > case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); > XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); > > > The thing is that the fall-through comments have to be placed at the > very bottom of each case. Ah, that's too bad. I was hoping to be able to put the fall-through comment prior to the case comment. > > Which do you prefer? I prefer your original patch over this one. Thanks for checking into this! Tom > > Thanks > -- > Gustavo > >> Thanks, >> Tom >> >>> case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: >>> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); >>> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); >>> @@ -1623,7 +1623,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, >>> /* PTP v2, UDP, Sync packet */ >>> case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: >>> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); >>> - /* PTP v1, UDP, Sync packet */ >>> + /* Fall through - to PTP v1, UDP, Sync packet */ >>> case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: >>> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); >>> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); >>> @@ -1634,7 +1634,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, >>> /* PTP v2, UDP, Delay_req packet */ >>> case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: >>> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); >>> - /* PTP v1, UDP, Delay_req packet */ >>> + /* Fall through - to PTP v1, UDP, Delay_req packet */ >>> case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: >>> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); >>> XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); >>>
From: "Gustavo A. R. Silva" <gustavo@embeddedor.com> Date: Wed, 24 Apr 2019 11:08:24 -0500 > In preparation to enabling -Wimplicit-fallthrough, mark switch > cases where we are expecting to fall through. > > This patch fixes the following warnings: ... > Warning level 3 was used: -Wimplicit-fallthrough=3 > > Notice that, in this particular case, the code comments are modified > in accordance with what GCC is expecting to find. > > This patch is part of the ongoing efforts to enable > -Wimplicit-fallthrough. > > Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Applied.
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c index 0cc911f928b1..3dd0cecddba8 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c @@ -1612,7 +1612,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, /* PTP v2, UDP, any kind of event packet */ case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); - /* PTP v1, UDP, any kind of event packet */ + /* Fall through - to PTP v1, UDP, any kind of event packet */ case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); @@ -1623,7 +1623,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, /* PTP v2, UDP, Sync packet */ case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); - /* PTP v1, UDP, Sync packet */ + /* Fall through - to PTP v1, UDP, Sync packet */ case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); @@ -1634,7 +1634,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, /* PTP v2, UDP, Delay_req packet */ case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); - /* PTP v1, UDP, Delay_req packet */ + /* Fall through - to PTP v1, UDP, Delay_req packet */ case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. This patch fixes the following warnings: In file included from drivers/net/ethernet/amd/xgbe/xgbe-drv.c:129: drivers/net/ethernet/amd/xgbe/xgbe-drv.c: In function ‘xgbe_set_hwtstamp_settings’: drivers/net/ethernet/amd/xgbe/xgbe-common.h:1392:9: warning: this statement may fall through [-Wimplicit-fallthrough=] (_var) |= (((_val) & ((0x1 << (_width)) - 1)) << (_index)); \ ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/amd/xgbe/xgbe-common.h:1419:2: note: in expansion of macro ‘SET_BITS’ SET_BITS((_var), \ ^~~~~~~~ drivers/net/ethernet/amd/xgbe/xgbe-drv.c:1614:3: note: in expansion of macro ‘XGMAC_SET_BITS’ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); ^~~~~~~~~~~~~~ drivers/net/ethernet/amd/xgbe/xgbe-drv.c:1616:2: note: here case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: ^~~~ In file included from drivers/net/ethernet/amd/xgbe/xgbe-drv.c:129: drivers/net/ethernet/amd/xgbe/xgbe-common.h:1392:9: warning: this statement may fall through [-Wimplicit-fallthrough=] (_var) |= (((_val) & ((0x1 << (_width)) - 1)) << (_index)); \ ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/amd/xgbe/xgbe-common.h:1419:2: note: in expansion of macro ‘SET_BITS’ SET_BITS((_var), \ ^~~~~~~~ drivers/net/ethernet/amd/xgbe/xgbe-drv.c:1625:3: note: in expansion of macro ‘XGMAC_SET_BITS’ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); ^~~~~~~~~~~~~~ drivers/net/ethernet/amd/xgbe/xgbe-drv.c:1627:2: note: here case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: ^~~~ In file included from drivers/net/ethernet/amd/xgbe/xgbe-drv.c:129: drivers/net/ethernet/amd/xgbe/xgbe-common.h:1392:9: warning: this statement may fall through [-Wimplicit-fallthrough=] (_var) |= (((_val) & ((0x1 << (_width)) - 1)) << (_index)); \ ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/amd/xgbe/xgbe-common.h:1419:2: note: in expansion of macro ‘SET_BITS’ SET_BITS((_var), \ ^~~~~~~~ drivers/net/ethernet/amd/xgbe/xgbe-drv.c:1636:3: note: in expansion of macro ‘XGMAC_SET_BITS’ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); ^~~~~~~~~~~~~~ drivers/net/ethernet/amd/xgbe/xgbe-drv.c:1638:2: note: here case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: ^~~~ Warning level 3 was used: -Wimplicit-fallthrough=3 Notice that, in this particular case, the code comments are modified in accordance with what GCC is expecting to find. This patch is part of the ongoing efforts to enable -Wimplicit-fallthrough. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> --- drivers/net/ethernet/amd/xgbe/xgbe-drv.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)