kernel: remove linux 4.4 support
[openwrt/openwrt.git] / package / devel / perf / musl-compat.h
1 #ifndef __PERF_MUSL_COMPAT_H
2 #define __PERF_MUSL_COMPAT_H
3
4 #ifndef __ASSEMBLER__
5
6 #include <sys/ioctl.h>
7 #include <asm/unistd.h>
8 #include <unistd.h>
9 #include <stdio.h>
10
11 #undef _IOWR
12 #undef _IOR
13 #undef _IOW
14 #undef _IOC
15 #undef _IO
16
17 #define _SC_LEVEL1_DCACHE_LINESIZE -1
18
19 static inline long sysconf_wrap(int name)
20 {
21 FILE *f;
22 int val;
23
24 switch (name) {
25 case _SC_LEVEL1_DCACHE_LINESIZE:
26 f = fopen("/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size", "r");
27 if (!f)
28 return 0;
29
30 if (fscanf(f, "%d", &val) != 1)
31 return 0;
32
33 fclose(f);
34 return val;
35 default:
36 return sysconf(name);
37 }
38 }
39
40 #define sysconf(_n) sysconf_wrap(_n)
41
42 #endif
43 #endif