From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
This is the generic implementation. I can't figure out an optimised
implementation for s390.
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Cc: linux-s390@xxxxxxxxxxxxxxx
---
arch/s390/include/asm/bitops.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/s390/include/asm/bitops.h b/arch/s390/include/asm/bitops.h
index 431e208a5ea4..d313ca6affaf 100644
--- a/arch/s390/include/asm/bitops.h
+++ b/arch/s390/include/asm/bitops.h
@@ -241,6 +241,15 @@ static inline void arch___clear_bit_unlock(unsigned long nr,
arch___clear_bit(nr, ptr);
}
+static inline bool arch_clear_bit_unlock_is_negative_byte(unsigned int nr,
+ volatile unsigned long *p)
+{
+ arch_clear_bit_unlock(nr, p);
+ return arch_test_bit(7, p);
+}
+#define arch_clear_bit_unlock_is_negative_byte \
+ arch_clear_bit_unlock_is_negative_byte
+
#include <asm-generic/bitops/instrumented-atomic.h>
#include <asm-generic/bitops/instrumented-non-atomic.h>
#include <asm-generic/bitops/instrumented-lock.h>
--
2.25.1
