X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-m68k%2Fbitops.h;h=3e8106442d5af6e7953b887ebdb8a35203e5f029;hb=896395c290f902576270d84291c1f7f8bfbe339d;hp=1a61fdb56aaf671dc82e669d009d6fb6f3e64324;hpb=e02a4cabfcb9a999b74a2e2e6f13ffcb7ff2d606;p=linux-2.6

diff --git a/include/asm-m68k/bitops.h b/include/asm-m68k/bitops.h
index 1a61fdb56a..3e8106442d 100644
--- a/include/asm-m68k/bitops.h
+++ b/include/asm-m68k/bitops.h
@@ -8,6 +8,10 @@
  * for more details.
  */
 
+#ifndef _LINUX_BITOPS_H
+#error only <linux/bitops.h> can be included directly
+#endif
+
 #include <linux/compiler.h>
 
 /*
@@ -314,6 +318,7 @@ static inline int fls(int x)
 #include <asm-generic/bitops/fls64.h>
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 /* Bitmap functions for the minix filesystem */
 
@@ -406,6 +411,49 @@ static inline int ext2_find_next_zero_bit(const void *vaddr, unsigned size,
 	return (p - addr) * 32 + res;
 }
 
+static inline int ext2_find_first_bit(const void *vaddr, unsigned size)
+{
+	const unsigned long *p = vaddr, *addr = vaddr;
+	int res;
+
+	if (!size)
+		return 0;
+
+	size = (size >> 5) + ((size & 31) > 0);
+	while (*p++ == 0UL) {
+		if (--size == 0)
+			return (p - addr) << 5;
+	}
+
+	--p;
+	for (res = 0; res < 32; res++)
+		if (ext2_test_bit(res, p))
+			break;
+	return (p - addr) * 32 + res;
+}
+
+static inline int ext2_find_next_bit(const void *vaddr, unsigned size,
+				     unsigned offset)
+{
+	const unsigned long *addr = vaddr;
+	const unsigned long *p = addr + (offset >> 5);
+	int bit = offset & 31UL, res;
+
+	if (offset >= size)
+		return size;
+
+	if (bit) {
+		/* Look for one in first longword */
+		for (res = bit; res < 32; res++)
+			if (ext2_test_bit(res, p))
+				return (p - addr) * 32 + res;
+		p++;
+	}
+	/* No set bit yet, search remaining full bytes for a set bit */
+	res = ext2_find_first_bit(p, size - 32 * (p - addr));
+	return (p - addr) * 32 + res;
+}
+
 #endif /* __KERNEL__ */
 
 #endif /* _M68K_BITOPS_H */