[PATCH] Fix Alpha compilation

When using gcc 3.3.3 on alpha, the current BK head doesn't compile.

- there's an external declaration for abs() in the same scope as a macro
  definition in arch/alpha/time.c

- The compiler is picky about `const' declarations, which breaks on
  bitops.h.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/alpha/kernel/time.c

@@ -523,7 +523,6 @@ EXPORT_SYMBOL(do_settimeofday);
  *      sets the minutes. Usually you won't notice until after reboot!
  */
 
-extern int abs(int);
 
 static int
 set_rtc_mmss(unsigned long nowtime)

include/asm-alpha/bitops.h

@@ -418,9 +418,9 @@ find_next_zero_bit(void * addr, unsigned long size, unsigned long offset)
  * Find next one bit in a bitmap reasonably efficiently.
  */
 static inline unsigned long
-find_next_bit(void * addr, unsigned long size, unsigned long offset)
+find_next_bit(const void * addr, unsigned long size, unsigned long offset)
 {
-	unsigned long * p = ((unsigned long *) addr) + (offset >> 6);
+	const unsigned long * p = ((const unsigned long *) addr) + (offset >> 6);
 	unsigned long result = offset & ~63UL;
 	unsigned long tmp;