Fixes so "make allnoconfig" works again.

[oweals/busybox.git] / libbb / syscalls.c

diff --git a/libbb/syscalls.c b/libbb/syscalls.c
index 7f7e0f55d5361c534b201368fa1be7cab025805a..6786b1e6ba4a5fd5c96ee715a977ed8f6acd1474 100644 (file)
--- a/libbb/syscalls.c
+++ b/libbb/syscalls.c
@@ -31,7 +31,16 @@
 
 int sysfs(int option, unsigned int fs_index, char * buf)
 {
+#ifndef __NR_pivot_root
+#warning This kernel does not support the sysfs syscall
+#warning -> The sysfs system call is being stubbed out...
+       bb_error_msg("\n\nTo make this application work, you will need to recompile\n"
+                    "BusyBox with a kernel supporting the pivot_root system call.\n");
+       errno = ENOSYS;
+       return -1;
+#else
        return(syscall(__NR_sysfs, option, fs_index, buf));
+#endif
 }
 
 int pivot_root(const char * new_root,const char * put_old)
@@ -74,7 +83,7 @@ int klogctl(int type, char *b, int len)
 
 int umount2(const char * special_file, int flags)
 {
-#ifndef __NR_pivot_root
+#ifndef __NR_umount2
 #warning This kernel does not support the umount2 syscall
 #warning -> The umount2 system call is being stubbed out...
        /* BusyBox was compiled against a kernel that did not support