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Diffstat (limited to 'include/linux/bitops.h')
-rw-r--r--include/linux/bitops.h50
1 files changed, 50 insertions, 0 deletions
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index 26bf15e6cd35..5e62e2383b7f 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -4,6 +4,7 @@
#include <asm/types.h>
#include <linux/bits.h>
+#include <linux/typecheck.h>
#include <uapi/linux/kernel.h>
@@ -253,6 +254,55 @@ static __always_inline void __assign_bit(long nr, volatile unsigned long *addr,
__clear_bit(nr, addr);
}
+/**
+ * __ptr_set_bit - Set bit in a pointer's value
+ * @nr: the bit to set
+ * @addr: the address of the pointer variable
+ *
+ * Example:
+ * void *p = foo();
+ * __ptr_set_bit(bit, &p);
+ */
+#define __ptr_set_bit(nr, addr) \
+ ({ \
+ typecheck_pointer(*(addr)); \
+ __set_bit(nr, (unsigned long *)(addr)); \
+ })
+
+/**
+ * __ptr_clear_bit - Clear bit in a pointer's value
+ * @nr: the bit to clear
+ * @addr: the address of the pointer variable
+ *
+ * Example:
+ * void *p = foo();
+ * __ptr_clear_bit(bit, &p);
+ */
+#define __ptr_clear_bit(nr, addr) \
+ ({ \
+ typecheck_pointer(*(addr)); \
+ __clear_bit(nr, (unsigned long *)(addr)); \
+ })
+
+/**
+ * __ptr_test_bit - Test bit in a pointer's value
+ * @nr: the bit to test
+ * @addr: the address of the pointer variable
+ *
+ * Example:
+ * void *p = foo();
+ * if (__ptr_test_bit(bit, &p)) {
+ * ...
+ * } else {
+ * ...
+ * }
+ */
+#define __ptr_test_bit(nr, addr) \
+ ({ \
+ typecheck_pointer(*(addr)); \
+ test_bit(nr, (unsigned long *)(addr)); \
+ })
+
#ifdef __KERNEL__
#ifndef set_mask_bits