diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-17 09:04:38 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-17 09:04:38 -0400 |
| commit | 54e514b91b95d6441c12a7955addfb9f9d2afc65 (patch) | |
| tree | 8b73d901bd2a6ec5a31f34a8954e5ea92216dd6c /Documentation/CodingStyle | |
| parent | 4fc8adcfec3da639da76e8314c9ccefe5bf9a045 (diff) | |
| parent | 6c8c90319c0bb1c9e0b68e721359b89ae4f28465 (diff) | |
Merge branch 'akpm' (patches from Andrew)
Merge third patchbomb from Andrew Morton:
- various misc things
- a couple of lib/ optimisations
- provide DIV_ROUND_CLOSEST_ULL()
- checkpatch updates
- rtc tree
- befs, nilfs2, hfs, hfsplus, fatfs, adfs, affs, bfs
- ptrace fixes
- fork() fixes
- seccomp cleanups
- more mmap_sem hold time reductions from Davidlohr
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (138 commits)
proc: show locks in /proc/pid/fdinfo/X
docs: add missing and new /proc/PID/status file entries, fix typos
drivers/rtc/rtc-at91rm9200.c: make IO endian agnostic
Documentation/spi/spidev_test.c: fix warning
drivers/rtc/rtc-s5m.c: allow usage on device type different than main MFD type
.gitignore: ignore *.tar
MAINTAINERS: add Mediatek SoC mailing list
tomoyo: reduce mmap_sem hold for mm->exe_file
powerpc/oprofile: reduce mmap_sem hold for exe_file
oprofile: reduce mmap_sem hold for mm->exe_file
mips: ip32: add platform data hooks to use DS1685 driver
lib/Kconfig: fix up HAVE_ARCH_BITREVERSE help text
x86: switch to using asm-generic for seccomp.h
sparc: switch to using asm-generic for seccomp.h
powerpc: switch to using asm-generic for seccomp.h
parisc: switch to using asm-generic for seccomp.h
mips: switch to using asm-generic for seccomp.h
microblaze: use asm-generic for seccomp.h
arm: use asm-generic for seccomp.h
seccomp: allow COMPAT sigreturn overrides
...
Diffstat (limited to 'Documentation/CodingStyle')
| -rw-r--r-- | Documentation/CodingStyle | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/CodingStyle b/Documentation/CodingStyle index 449a8a19fc21..4d4f06d47e06 100644 --- a/Documentation/CodingStyle +++ b/Documentation/CodingStyle @@ -659,6 +659,19 @@ macros using parameters. #define CONSTANT 0x4000 #define CONSTEXP (CONSTANT | 3) +5) namespace collisions when defining local variables in macros resembling +functions: + +#define FOO(x) \ +({ \ + typeof(x) ret; \ + ret = calc_ret(x); \ + (ret); \ +)} + +ret is a common name for a local variable - __foo_ret is less likely +to collide with an existing variable. + The cpp manual deals with macros exhaustively. The gcc internals manual also covers RTL which is used frequently with assembly language in the kernel. |