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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-24 11:30:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-24 11:30:52 -0700 |
| commit | 2bf74771ca5610b10c3ac4cd17aacc389e6927ca (patch) | |
| tree | 05a57bb60ea02d9119e42c5acbef603a30dfe2a3 /kernel/trace | |
| parent | d012a7190fc1fd72ed48911e77ca97ba4521bccd (diff) | |
| parent | df561f6688fef775baa341a0f5d960becd248b11 (diff) | |
Merge tag 'fallthrough-pseudo-keyword-5.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux
Pull 'fallthrough' keyword conversion from Gustavo A. R. Silva:
"A tree-wide patch that replaces tons (2484) of /* fall through */
comments, and its variants, with the new pseudo-keyword macro
fallthrough[1]. Also, remove unnecessary fall-through markings when it
is the case.
There are currently 1167 intances of this fallthrough pseudo-keyword
macro in mainline (5.9-rc2), that have been introduced over the last
couple of development cycles:
$ git grep -nw 'fallthrough;' | wc -l
1167
The global adoption of the fallthrough pseudo-keyword is something
certain to happen; so, better sooner than later. :) This will also
save everybody's time and thousands of lines of unnecessarily
repetitive changelog text.
After applying this patch on top of 5.9-rc2, we'll have a total of
3651 instances of this macro:
$ git grep -nw 'fallthrough;' | wc -l
3651
This treewide patch doesn't address ALL fall-through markings in all
subsystems at once because I have previously sent out patches for some
of such subsystems separately, and I will follow up on them; however,
this definitely contributes most of the work needed to replace all the
fall-through markings with the fallthrough pseudo-keyword macro in the
whole codebase.
I have build-tested this patch on 10 different architectures: x86_64,
i386, arm64, powerpc, s390, sparc64, sh, m68k, powerpc64 and alpha
(allyesconfig for all of them). This is in linux-next already and
kernel test robot has also helped me to successfully build-test early
versions of this patch[2][3][4][5]"
[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through
[2] https://lore.kernel.org/lkml/5f3cc99a.HgvOW3rH0mD0RmkM%25lkp@intel.com/
[3] https://lore.kernel.org/lkml/5f3dd1d2.l1axczH+t4hMBZ63%25lkp@intel.com/
[4] https://lore.kernel.org/lkml/5f3e977a.mwYHUIObbR4SHr0B%25lkp@intel.com/
[5] https://lore.kernel.org/lkml/5f3f9e1c.qsyb%2FaySkiXNpkO4%25lkp@intel.com/
* tag 'fallthrough-pseudo-keyword-5.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux:
treewide: Use fallthrough pseudo-keyword
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/blktrace.c | 2 | ||||
| -rw-r--r-- | kernel/trace/trace_events_filter.c | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index 7ba62d68885a..4b3a42fc3b24 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -745,7 +745,7 @@ int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg) #endif case BLKTRACESTART: start = 1; - /* fall through */ + fallthrough; case BLKTRACESTOP: ret = __blk_trace_startstop(q, start); break; diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index bf44f6bbd0c3..78a678eeb140 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -499,7 +499,7 @@ predicate_parse(const char *str, int nr_parens, int nr_preds, ptr++; break; } - /* fall through */ + fallthrough; default: parse_error(pe, FILT_ERR_TOO_MANY_PREDS, next - str); @@ -1273,7 +1273,7 @@ static int parse_pred(const char *str, void *data, switch (op) { case OP_NE: pred->not = 1; - /* Fall through */ + fallthrough; case OP_GLOB: case OP_EQ: break; |