diff options
| author | Denys Vlasenko <vda.linux@googlemail.com> | 2020-12-14 18:25:28 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2020-12-14 18:25:28 +0100 |
| commit | fd3c512f88d43e6633bd3c3110cfa0bb321adaa8 (patch) | |
| tree | 97211484388a0db0a85957f2e3f3724cb1c9159f /util-linux | |
| parent | db793480cb8ec3e5f878d1ec18b6ed5010c85e85 (diff) | |
libbb: create and use mmap() helpers
function old new delta
mmap_anon - 22 +22
mmap_read - 21 +21
xmmap_anon - 16 +16
rpm_gettags 465 447 -18
bb_full_fd_action 498 480 -18
uevent_main 337 310 -27
------------------------------------------------------------------------------
(add/remove: 3/0 grow/shrink: 0/3 up/down: 59/-63) Total: -4 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'util-linux')
| -rw-r--r-- | util-linux/uevent.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/util-linux/uevent.c b/util-linux/uevent.c index 045b35432..015f1ee78 100644 --- a/util-linux/uevent.c +++ b/util-linux/uevent.c @@ -74,12 +74,7 @@ int uevent_main(int argc UNUSED_PARAM, char **argv) // for a new uevent notification to come in. // We use a fresh mmap so that buffer is not allocated // until kernel actually starts filling it. - netbuf = mmap(NULL, USER_RCVBUF, - PROT_READ | PROT_WRITE, - MAP_PRIVATE | MAP_ANON, - /* ignored: */ -1, 0); - if (netbuf == MAP_FAILED) - bb_simple_perror_msg_and_die("mmap"); + netbuf = xmmap_anon(USER_RCVBUF); // Here we block, possibly for a very long time len = safe_read(fd, netbuf, USER_RCVBUF - 1); |