libbb: add and use infrastructure for fixed page size optimization

function                                             old     new   delta
procps_scan                                         1121    1118      -3
getpagesize                                            6       -      -6
rpm_main                                            1037    1027     -10
rpm2cpio_main                                        120     110     -10
ptok                                                  38      21     -17
time_main                                           1282    1261     -21
mkswap_main                                          317     278     -39
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 0/6 up/down: 0/-106)           Total: -106 bytes

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

1 files changed, 2 insertions, 2 deletions

diff --git a/libbb/procps.c b/libbb/procps.c
index 4cc3cb2a1..975e0d4dc 100644
--- a/libbb/procps.c
+++ b/libbb/procps.c
@@ -94,15 +94,15 @@ static int read_to_buf(const char *filename, void *buf)
 
 static procps_status_t* FAST_FUNC alloc_procps_scan(void)
 {
-        unsigned n = getpagesize();
         procps_status_t* sp = xzalloc(sizeof(procps_status_t));
-        sp->dir = xopendir("/proc");
+        unsigned n = bb_getpagesize();
         while (1) {
                 n >>= 1;
                 if (!n) break;
                 sp->shift_pages_to_bytes++;
         }
         sp->shift_pages_to_kb = sp->shift_pages_to_bytes - 10;
+        sp->dir = xopendir("/proc");
         return sp;
 }