diff options
| author | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2013-03-24 19:59:00 -0400 |
|---|---|---|
| committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2013-04-05 19:50:57 -0400 |
| commit | b92bea5d2a9481de69bb627a7b442a9f58fca43d (patch) | |
| tree | d43f5e340014d5c3ce723eabb60cd74e3dd20a18 /src/vconsole | |
| parent | 8c62ecf1a99ab4a3f69cb81be38715c504ef5723 (diff) | |
Use initalization instead of explicit zeroing
Before, we would initialize many fields twice: first
by filling the structure with zeros, and then a second
time with the real values. We can let the compiler do
the job for us, avoiding one copy.
A downside of this patch is that text gets slightly
bigger. This is because all zero() calls are effectively
inlined:
$ size build/.libs/systemd
text data bss dec hex filename
before 897737 107300 2560 1007597 f5fed build/.libs/systemd
after 897873 107300 2560 1007733 f6075 build/.libs/systemd
… actually less than 1‰.
A few asserts that the parameter is not null had to be removed. I
don't think this changes much, because first, it is quite unlikely
for the assert to fail, and second, an immediate SEGV is almost as
good as an assert.
Diffstat (limited to 'src/vconsole')
| -rw-r--r-- | src/vconsole/vconsole-setup.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/src/vconsole/vconsole-setup.c b/src/vconsole/vconsole-setup.c index efeae909d9..ee1f3ebdb0 100644 --- a/src/vconsole/vconsole-setup.c +++ b/src/vconsole/vconsole-setup.c @@ -179,20 +179,18 @@ static int font_load(const char *vc, const char *font, const char *map, const ch * to apply a new font to all VTs. */ static void font_copy_to_all_vcs(int fd) { - struct vt_stat vcs; - int i; - int r; + struct vt_stat vcs = {}; + int i, r; /* get active, and 16 bit mask of used VT numbers */ - zero(vcs); r = ioctl(fd, VT_GETSTATE, &vcs); if (r < 0) return; for (i = 1; i <= 15; i++) { char vcname[16]; - struct console_font_op cfo; int _cleanup_close_ vcfd = -1; + struct console_font_op cfo = {}; if (i == vcs.v_active) continue; @@ -208,7 +206,6 @@ static void font_copy_to_all_vcs(int fd) { continue; /* copy font from active VT, where the font was uploaded to */ - zero(cfo); cfo.op = KD_FONT_OP_COPY; cfo.height = vcs.v_active-1; /* tty1 == index 0 */ ioctl(vcfd, KDFONTOP, &cfo); |