3 files changed, 18 insertions, 3 deletions
diff --git a/lib/lib.c b/lib/lib.c
index ceced263..b6277f3b 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -512,6 +512,16 @@ void msleep(long miliseconds)
   nanosleep(&ts, &ts);
 }
 
+// return 1<<x of highest bit set
+int highest_bit(unsigned long l)
+{
+  int i;
+
+  for (i = 0; l; i++) l >>= 1;
+
+  return i-1;
+}
+
 // Inefficient, but deals with unaligned access
 int64_t peek_le(void *ptr, unsigned size)
 {
diff --git a/lib/lib.h b/lib/lib.h
index efdc1fa4..5d2bb4df 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -192,6 +192,7 @@ struct string_list **splitpath(char *path, struct string_list **list);
 char *readfileat(int dirfd, char *name, char *buf, off_t *len);
 char *readfile(char *name, char *buf, off_t len);
 void msleep(long miliseconds);
+int highest_bit(unsigned long l);
 int64_t peek_le(void *ptr, unsigned size);
 int64_t peek_be(void *ptr, unsigned size);
 int64_t peek(void *ptr, unsigned size);
diff --git a/lib/portability.h b/lib/portability.h
index 01c77c67..e62de139 100644
--- a/lib/portability.h
+++ b/lib/portability.h
@@ -45,9 +45,13 @@
 #define RLIMIT_RTTIME 15
 #endif
 
+// Introduced in Linux 3.1
 #ifndef SEEK_DATA
 #define SEEK_DATA 3
 #endif
+#ifndef SEEK_HOLE
+#define SEEK_HOLE 4
+#endif
 
 // We don't define GNU_dammit because we're not part of the gnu project, and
 // don't want to get any FSF on us. Unfortunately glibc (gnu libc)
@@ -199,18 +203,18 @@ static inline void endutxent(void) {;}
 #ifndef O_NOFOLLOW
 #define O_NOFOLLOW 0
 #endif
-
 #ifndef O_NOATIME
 #define O_NOATIME 01000000
 #endif
-
 #ifndef O_CLOEXEC
 #define O_CLOEXEC 02000000
 #endif
-
 #ifndef O_PATH
 #define O_PATH   010000000
 #endif
+#ifndef SCHED_RESET_ON_FORK
+#define SCHED_RESET_ON_FORK (1<<30)
+#endif
 
 // Glibc won't give you linux-kernel constants unless you say "no, a BUD lite"
 // even though linux has nothing to do with the FSF and never has.