Gitweb:
https://sourceware.org/git/?p=lvm2.git;a=commitdiff;h=ef21ed78ae5a3dd0b30...
Commit: ef21ed78ae5a3dd0b30e4b247ec3774347cadb4d
Parent: 6a186dd1e85cecac84f0bc5cc32c0e47fd33994f
Author: Zdenek Kabelac <zkabelac(a)redhat.com>
AuthorDate: Fri Sep 24 21:43:30 2021 +0200
Committer: Zdenek Kabelac <zkabelac(a)redhat.com>
CommitterDate: Mon Sep 27 18:56:14 2021 +0200
utils: define macro for ffs
Provide ffs() macro using __builtin_ffs(), when there is missing
ffs() implementation in header file.
Reported-by: adamboardman of gemian
---
lib/misc/util.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/lib/misc/util.h b/lib/misc/util.h
index a42ecb355..35514eee0 100644
--- a/lib/misc/util.h
+++ b/lib/misc/util.h
@@ -89,6 +89,14 @@ static unsigned _dm_clzll(unsigned long long x)
#define clzll(x) _dm_clzll((x))
#endif /* ifdef HAVE___BUILTIN_CLZLL */
+#ifndef HAVE_FFS
+#ifdef HAVE___BUILTIN_FFS
+#define ffs(x) __builtin_ffs((x))
+#else
+#error ffs() not implemented!
+#endif /* ifdef HAVE___BUILTIN_FFS */
+#endif /* ifndef HAVE_FFS */
+
#define KERNEL_VERSION(major, minor, release) (((major) << 16) + ((minor) <<
8) + (release))
/* Define some portable printing types */