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spare archs without time32 legacy the cost of ioctl fallback conversions

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adding this condition makes the entire convert_ioctl_struct function
and compat_map table statically unreachable, and thereby optimized out
by dead code elimination, on archs where they are not needed.
This commit is contained in:
Rich Felker 2019-12-22 13:25:17 -05:00
parent f989581732
commit d01fdc777d
1 changed files with 1 additions and 1 deletions
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src/misc/ioctl.c
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@ -120,7 +120,7 @@ int ioctl(int fd, int req, ...)
arg = va_arg(ap, void *);
va_end(ap);
int r = __syscall(SYS_ioctl, fd, req, arg);
if (req && r==-ENOTTY) {
if (SIOCGSTAMP != SIOCGSTAMP_OLD && req && r==-ENOTTY) {
for (int i=0; i<sizeof compat_map/sizeof *compat_map; i++) {
if (compat_map[i].new_req != req) continue;
union {