From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
This is the generic implementation. Someone who knows m68k assembly
can probably do better (the BFCLR instruction appears to set the N bit
appropriately).
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: linux-m68k@xxxxxxxxxxxxxxxxxxxx
---
arch/m68k/include/asm/bitops.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/m68k/include/asm/bitops.h b/arch/m68k/include/asm/bitops.h
index 10133a968c8e..bfb34e0748fe 100644
--- a/arch/m68k/include/asm/bitops.h
+++ b/arch/m68k/include/asm/bitops.h
@@ -524,6 +524,13 @@ static inline int __fls(int x)
#define clear_bit_unlock clear_bit
#define __clear_bit_unlock clear_bit_unlock
+static inline bool clear_bit_unlock_is_negative_byte(unsigned int nr,
+ volatile unsigned long *p)
+{
+ clear_bit_unlock(nr, p);
+ return test_bit(7, p);
+}
+
#include <asm-generic/bitops/ext2-atomic.h>
#include <asm-generic/bitops/le.h>
#include <asm-generic/bitops/fls64.h>
--
2.25.1
