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Subject[PATCH 0/4] treewide: Add 'fallthrough' pseudo-keyword
Date
Add 'fallthrough' pseudo-keyword to enable the removal of comments
like '/* fallthrough */'.

Add a script to convert the fallthrough comments.

The script can be run over any single file or treewide.

For instance, a treewide conversion can be done using:

$ git ls-files -- '*.[ch]' | \
xargs scripts/cvt_style.pl -o --convert=fallthrough

This currently produces:

$ git diff --shortstat
1839 files changed, 4377 insertions(+), 4698 deletions(-)

Example fallthrough conversion produced by the script:

$ scripts/cvt_style.pl -o --convert=fallthrough arch/arm/mm/alignment.c

a/arch/arm/mm/alignment.c
b/arch/arm/mm/alignment.c
@@ -695,8 +695,7 @@ thumb2arm(u16 tinstr)
return subset[(L<<1) | ((tinstr & (1<<8)) >> 8)] |
(tinstr & 255); /* register_list */
}
- /* Else, fall through - for illegal instruction case */
-
+ fallthrough; /* for illegal instruction case */
default:
return BAD_INSTR;
}
@@ -751,8 +750,7 @@ do_alignment_t32_to_handler(unsigned long *pinstr, struct pt_regs *regs,
case 0xe8e0:
case 0xe9e0:
poffset->un = (tinst2 & 0xff) << 2;
- /* Fall through */
-
+ fallthrough;
case 0xe940:
case 0xe9c0:
return do_alignment_ldrdstrd;
Joe Perches (4):
net: sctp: Rename fallthrough label to unhandled
compiler_attributes.h: Add 'fallthrough' pseudo keyword for switch/case use
Documentation/process: Add fallthrough pseudo-keyword
scripts/cvt_style.pl: Tool to reformat sources in various ways

Documentation/process/coding-style.rst | 2 +-
Documentation/process/deprecated.rst | 33 +-
include/linux/compiler_attributes.h | 17 +
net/sctp/sm_make_chunk.c | 12 +-
scripts/cvt_style.pl | 808 +++++++++++++++++++++++++++++++++
5 files changed, 855 insertions(+), 17 deletions(-)
create mode 100755 scripts/cvt_style.pl
--
2.15.0

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