Optimize code if we have only one personality

On i386:
   text	   data	    bss	    dec	    hex	filename
 238025	    672	  18980	 257677	  3ee8d	strace.before
 237389	    704	  18944	 257037	  3ec0d	strace

* defs.h: Define PERSONALITY0_WORDSIZE as sizeof(long) if not defined.
Introduce new define, current_wordsize as
(personality_wordsize[current_personality]).
Make set_personality() no-op, current_personality constant zero,
current_wordsize as PERSONALITY0_WORDSIZE if we have only one personality.
* count.c (call_summary): Use current_wordsize instead of
personality_wordsize[current_personality].
* desc.c (printflock): Likewise.
* file.c (sys_utime): Likewise.
* io.c (tprint_iov): Likewise.
* process.c (printargv): Likewise.
* resource.c (decode_rlimit): Likewise.
* signal.c (sys_kill): Likewise.
(sys_rt_sigaction): Likewise.
* time.c (sprinttv): Likewise.
(sprint_timespec): Likewise.
(printitv_bitness): Likewise.
(tprint_timex): Likewise.
(printsigevent): Likewise.
* util.c (dumpiov): Likewise.
(umoven): Likewise.
(umovestr): Likewise.
* syscall.c: Initialize sysent to sysent0 etc.
Make current_personality, personality_wordsize[], set_personality()
conditional on SUPPORTED_PERSONALITIES > 1.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/resource.c b/resource.c
index 77a94a2..d7a34ef 100644
--- a/resource.c
+++ b/resource.c
@@ -180,7 +180,7 @@ decode_rlimit(struct tcb *tcp, unsigned long addr)
 # if SIZEOF_RLIM_T == 4
 		print_rlimit32(tcp, addr);
 # else
-		if (personality_wordsize[current_personality] == 4)
+		if (current_wordsize == 4)
 			print_rlimit32(tcp, addr);
 		else
 			print_rlimit64(tcp, addr);