* [PATCH] Add a comment to indicate valid fallthrough
@ 2017-04-19 19:13 Khem Raj
2017-04-28 15:16 ` Khem Raj
0 siblings, 1 reply; 2+ messages in thread
From: Khem Raj @ 2017-04-19 19:13 UTC (permalink / raw)
To: linux-raid; +Cc: Khem Raj
gcc7 warns about code with fallthroughs, this patch adds
the comment to indicate a valid fallthrough, helps gcc7
compiler warnings
This works in cross and native compilation case
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
Grow.c | 4 ++++
bitmap.c | 8 ++++++++
mdadm.c | 2 ++
super-intel.c | 1 +
util.c | 1 +
5 files changed, 16 insertions(+)
diff --git a/Grow.c b/Grow.c
index 455c5f9..27c73b1 100755
--- a/Grow.c
+++ b/Grow.c
@@ -1257,6 +1257,7 @@ char *analyse_change(char *devname, struct mdinfo *info, struct reshape *re)
switch (info->new_level) {
case 4:
delta_parity = 1;
+ /* fallthrough */
case 0:
re->level = 4;
re->before.layout = 0;
@@ -1284,10 +1285,12 @@ char *analyse_change(char *devname, struct mdinfo *info, struct reshape *re)
case 4:
info->array.layout = ALGORITHM_PARITY_N;
+ /* fallthrough */
case 5:
switch (info->new_level) {
case 0:
delta_parity = -1;
+ /* fallthrough */
case 4:
re->level = info->array.level;
re->before.data_disks = info->array.raid_disks - 1;
@@ -1343,6 +1346,7 @@ char *analyse_change(char *devname, struct mdinfo *info, struct reshape *re)
case 4:
case 5:
delta_parity = -1;
+ /* fallthrough */
case 6:
re->level = 6;
re->before.data_disks = info->array.raid_disks - 2;
diff --git a/bitmap.c b/bitmap.c
index ccedfd3..a6ff091 100644
--- a/bitmap.c
+++ b/bitmap.c
@@ -82,13 +82,21 @@ static inline int count_dirty_bits_byte(char byte, int num_bits)
switch (num_bits) { /* fall through... */
case 8: if (byte & 128) num++;
+ /* fallthrough */
case 7: if (byte & 64) num++;
+ /* fallthrough */
case 6: if (byte & 32) num++;
+ /* fallthrough */
case 5: if (byte & 16) num++;
+ /* fallthrough */
case 4: if (byte & 8) num++;
+ /* fallthrough */
case 3: if (byte & 4) num++;
+ /* fallthrough */
case 2: if (byte & 2) num++;
+ /* fallthrough */
case 1: if (byte & 1) num++;
+ /* fallthrough */
default: break;
}
diff --git a/mdadm.c b/mdadm.c
index c3a265b..2d06d3b 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -148,6 +148,7 @@ int main(int argc, char *argv[])
mode == CREATE || mode == GROW ||
mode == INCREMENTAL || mode == MANAGE)
break; /* b means bitmap */
+ /* fallthrough */
case Brief:
c.brief = 1;
continue;
@@ -828,6 +829,7 @@ int main(int argc, char *argv[])
case O(INCREMENTAL,NoDegraded):
pr_err("--no-degraded is deprecated in Incremental mode\n");
+ /* fallthrough */
case O(ASSEMBLE,NoDegraded): /* --no-degraded */
c.runstop = -1; /* --stop isn't allowed for --assemble,
* so we overload slightly */
diff --git a/super-intel.c b/super-intel.c
index 4e466ff..00a2925 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -3271,6 +3271,7 @@ static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info,
<< SECT_PER_MB_SHIFT;
}
}
+ /* fallthrough */
case MIGR_VERIFY:
/* we could emulate the checkpointing of
* 'sync_action=check' migrations, but for now
diff --git a/util.c b/util.c
index 32bd909..f2a4d19 100644
--- a/util.c
+++ b/util.c
@@ -335,6 +335,7 @@ unsigned long long parse_size(char *size)
switch (*c) {
case 'K':
c++;
+ /* fallthrough */
default:
s *= 2;
break;
--
2.12.2
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] Add a comment to indicate valid fallthrough
2017-04-19 19:13 [PATCH] Add a comment to indicate valid fallthrough Khem Raj
@ 2017-04-28 15:16 ` Khem Raj
0 siblings, 0 replies; 2+ messages in thread
From: Khem Raj @ 2017-04-28 15:16 UTC (permalink / raw)
To: linux-raid; +Cc: Khem Raj
ping
On Wed, Apr 19, 2017 at 12:13 PM, Khem Raj <raj.khem@gmail.com> wrote:
> gcc7 warns about code with fallthroughs, this patch adds
> the comment to indicate a valid fallthrough, helps gcc7
> compiler warnings
>
> This works in cross and native compilation case
>
> Signed-off-by: Khem Raj <raj.khem@gmail.com>
> ---
> Grow.c | 4 ++++
> bitmap.c | 8 ++++++++
> mdadm.c | 2 ++
> super-intel.c | 1 +
> util.c | 1 +
> 5 files changed, 16 insertions(+)
>
> diff --git a/Grow.c b/Grow.c
> index 455c5f9..27c73b1 100755
> --- a/Grow.c
> +++ b/Grow.c
> @@ -1257,6 +1257,7 @@ char *analyse_change(char *devname, struct mdinfo *info, struct reshape *re)
> switch (info->new_level) {
> case 4:
> delta_parity = 1;
> + /* fallthrough */
> case 0:
> re->level = 4;
> re->before.layout = 0;
> @@ -1284,10 +1285,12 @@ char *analyse_change(char *devname, struct mdinfo *info, struct reshape *re)
>
> case 4:
> info->array.layout = ALGORITHM_PARITY_N;
> + /* fallthrough */
> case 5:
> switch (info->new_level) {
> case 0:
> delta_parity = -1;
> + /* fallthrough */
> case 4:
> re->level = info->array.level;
> re->before.data_disks = info->array.raid_disks - 1;
> @@ -1343,6 +1346,7 @@ char *analyse_change(char *devname, struct mdinfo *info, struct reshape *re)
> case 4:
> case 5:
> delta_parity = -1;
> + /* fallthrough */
> case 6:
> re->level = 6;
> re->before.data_disks = info->array.raid_disks - 2;
> diff --git a/bitmap.c b/bitmap.c
> index ccedfd3..a6ff091 100644
> --- a/bitmap.c
> +++ b/bitmap.c
> @@ -82,13 +82,21 @@ static inline int count_dirty_bits_byte(char byte, int num_bits)
>
> switch (num_bits) { /* fall through... */
> case 8: if (byte & 128) num++;
> + /* fallthrough */
> case 7: if (byte & 64) num++;
> + /* fallthrough */
> case 6: if (byte & 32) num++;
> + /* fallthrough */
> case 5: if (byte & 16) num++;
> + /* fallthrough */
> case 4: if (byte & 8) num++;
> + /* fallthrough */
> case 3: if (byte & 4) num++;
> + /* fallthrough */
> case 2: if (byte & 2) num++;
> + /* fallthrough */
> case 1: if (byte & 1) num++;
> + /* fallthrough */
> default: break;
> }
>
> diff --git a/mdadm.c b/mdadm.c
> index c3a265b..2d06d3b 100644
> --- a/mdadm.c
> +++ b/mdadm.c
> @@ -148,6 +148,7 @@ int main(int argc, char *argv[])
> mode == CREATE || mode == GROW ||
> mode == INCREMENTAL || mode == MANAGE)
> break; /* b means bitmap */
> + /* fallthrough */
> case Brief:
> c.brief = 1;
> continue;
> @@ -828,6 +829,7 @@ int main(int argc, char *argv[])
>
> case O(INCREMENTAL,NoDegraded):
> pr_err("--no-degraded is deprecated in Incremental mode\n");
> + /* fallthrough */
> case O(ASSEMBLE,NoDegraded): /* --no-degraded */
> c.runstop = -1; /* --stop isn't allowed for --assemble,
> * so we overload slightly */
> diff --git a/super-intel.c b/super-intel.c
> index 4e466ff..00a2925 100644
> --- a/super-intel.c
> +++ b/super-intel.c
> @@ -3271,6 +3271,7 @@ static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info,
> << SECT_PER_MB_SHIFT;
> }
> }
> + /* fallthrough */
> case MIGR_VERIFY:
> /* we could emulate the checkpointing of
> * 'sync_action=check' migrations, but for now
> diff --git a/util.c b/util.c
> index 32bd909..f2a4d19 100644
> --- a/util.c
> +++ b/util.c
> @@ -335,6 +335,7 @@ unsigned long long parse_size(char *size)
> switch (*c) {
> case 'K':
> c++;
> + /* fallthrough */
> default:
> s *= 2;
> break;
> --
> 2.12.2
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2017-04-19 19:13 [PATCH] Add a comment to indicate valid fallthrough Khem Raj
2017-04-28 15:16 ` Khem Raj
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