kernel.h: remove initialization of bool in printk_once
Don't initialize __print_once. Invert the test to reduce initialized
data.
defconfig before: $size vmlinux
text data bss dec hex filename
6976022 679572
1359668 9015262 898fde vmlinux
defconfig after: $size vmlinux
text data bss dec hex filename
6976006 679508
1359700 9015214 898fae vmlinux
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>