Make bitops/cpumask functions be "const" where appropriate.

arch/ppc64/kernel/bitops.c

@@ -7,10 +7,10 @@
 #include <asm/bitops.h>
 #include <asm/byteorder.h>
 
-unsigned long find_next_zero_bit(unsigned long *addr, unsigned long size,
+unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size,
 				 unsigned long offset)
 {
-	unsigned long *p = addr + (offset >> 6);
+	const unsigned long *p = addr + (offset >> 6);
 	unsigned long result = offset & ~63UL;
 	unsigned long tmp;
 
@@ -48,10 +48,10 @@ unsigned long find_next_zero_bit(unsigned long *addr, unsigned long size,
 
 EXPORT_SYMBOL(find_next_zero_bit);
 
-unsigned long find_next_bit(unsigned long *addr, unsigned long size,
+unsigned long find_next_bit(const unsigned long *addr, unsigned long size,
 			    unsigned long offset)
 {
-	unsigned long *p = addr + (offset >> 6);
+	const unsigned long *p = addr + (offset >> 6);
 	unsigned long result = offset & ~63UL;
 	unsigned long tmp;
 
@@ -106,10 +106,10 @@ static inline unsigned int ext2_ffz(unsigned int x)
 	return rc;
 }
 
-unsigned long find_next_zero_le_bit(unsigned long *addr, unsigned long size,
+unsigned long find_next_zero_le_bit(const unsigned long *addr, unsigned long size,
 				    unsigned long offset)
 {
-	unsigned int *p = ((unsigned int *)addr) + (offset >> 5);
+	const unsigned int *p = ((const unsigned int *)addr) + (offset >> 5);
 	unsigned int result = offset & ~31;
 	unsigned int tmp;
 

include/asm-ppc64/bitops.h

@@ -288,15 +288,15 @@ static __inline__ int ffs(int x)
 #define hweight16(x) generic_hweight16(x)
 #define hweight8(x) generic_hweight8(x)
 
-extern unsigned long find_next_zero_bit(unsigned long *addr, unsigned long size, unsigned long offset);
+extern unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size, unsigned long offset);
 #define find_first_zero_bit(addr, size) \
 	find_next_zero_bit((addr), (size), 0)
 
-extern unsigned long find_next_bit(unsigned long *addr, unsigned long size, unsigned long offset);
+extern unsigned long find_next_bit(const unsigned long *addr, unsigned long size, unsigned long offset);
 #define find_first_bit(addr, size) \
 	find_next_bit((addr), (size), 0)
 
-extern unsigned long find_next_zero_le_bit(unsigned long *addr, unsigned long size, unsigned long offset);
+extern unsigned long find_next_zero_le_bit(const unsigned long *addr, unsigned long size, unsigned long offset);
 #define find_first_zero_le_bit(addr, size) \
 	find_next_zero_le_bit((addr), (size), 0)
 

include/asm-s390/byteorder.h

@@ -14,7 +14,7 @@
 #ifdef __GNUC__
 
 #ifdef __s390x__
-static __inline__ __u64 ___arch__swab64p(__u64 *x)
+static __inline__ __u64 ___arch__swab64p(const __u64 *x)
 {
 	__u64 result;
 
@@ -40,7 +40,7 @@ static __inline__ void ___arch__swab64s(__u64 *x)
 }
 #endif /* __s390x__ */
 
-static __inline__ __u32 ___arch__swab32p(__u32 *x)
+static __inline__ __u32 ___arch__swab32p(const __u32 *x)
 {
 	__u32 result;
 	
@@ -77,7 +77,7 @@ static __inline__ void ___arch__swab32s(__u32 *x)
 	*x = ___arch__swab32p(x);
 }
 
-static __inline__ __u16 ___arch__swab16p(__u16 *x)
+static __inline__ __u16 ___arch__swab16p(const __u16 *x)
 {
 	__u16 result;
 	

include/linux/byteorder/swab.h

@@ -134,7 +134,7 @@ static __inline__ __attribute_const__ __u16 __fswab16(__u16 x)
 {
 	return __arch__swab16(x);
 }
-static __inline__ __u16 __swab16p(__u16 *x)
+static __inline__ __u16 __swab16p(const __u16 *x)
 {
 	return __arch__swab16p(x);
 }
@@ -147,7 +147,7 @@ static __inline__ __attribute_const__ __u32 __fswab32(__u32 x)
 {
 	return __arch__swab32(x);
 }
-static __inline__ __u32 __swab32p(__u32 *x)
+static __inline__ __u32 __swab32p(const __u32 *x)
 {
 	return __arch__swab32p(x);
 }
@@ -167,7 +167,7 @@ static __inline__ __attribute_const__ __u64 __fswab64(__u64 x)
 	return __arch__swab64(x);
 #  endif
 }
-static __inline__ __u64 __swab64p(__u64 *x)
+static __inline__ __u64 __swab64p(const __u64 *x)
 {
 	return __arch__swab64p(x);
 }

include/linux/cpumask.h

@@ -171,19 +171,19 @@ static inline int __cpus_subset(cpumask_t *src1p,
 }
 
 #define cpus_empty(src) __cpus_empty(&(src), NR_CPUS)
-static inline int __cpus_empty(cpumask_t *srcp, int nbits)
+static inline int __cpus_empty(const cpumask_t *srcp, int nbits)
 {
 	return bitmap_empty(srcp->bits, nbits);
 }
 
 #define cpus_full(cpumask) __cpus_full(&(cpumask), NR_CPUS)
-static inline int __cpus_full(cpumask_t *srcp, int nbits)
+static inline int __cpus_full(const cpumask_t *srcp, int nbits)
 {
 	return bitmap_full(srcp->bits, nbits);
 }
 
 #define cpus_weight(cpumask) __cpus_weight(&(cpumask), NR_CPUS)
-static inline int __cpus_weight(cpumask_t *srcp, int nbits)
+static inline int __cpus_weight(const cpumask_t *srcp, int nbits)
 {
 	return bitmap_weight(srcp->bits, nbits);
 }
@@ -191,7 +191,7 @@ static inline int __cpus_weight(cpumask_t *srcp, int nbits)
 #define cpus_shift_right(dst, src, n) \
 			__cpus_shift_right(&(dst), &(src), (n), NR_CPUS)
 static inline void __cpus_shift_right(cpumask_t *dstp,
-					cpumask_t *srcp, int n, int nbits)
+					const cpumask_t *srcp, int n, int nbits)
 {
 	bitmap_shift_right(dstp->bits, srcp->bits, n, nbits);
 }
@@ -199,19 +199,19 @@ static inline void __cpus_shift_right(cpumask_t *dstp,
 #define cpus_shift_left(dst, src, n) \
 			__cpus_shift_left(&(dst), &(src), (n), NR_CPUS)
 static inline void __cpus_shift_left(cpumask_t *dstp,
-					cpumask_t *srcp, int n, int nbits)
+					const cpumask_t *srcp, int n, int nbits)
 {
 	bitmap_shift_left(dstp->bits, srcp->bits, n, nbits);
 }
 
 #define first_cpu(src) __first_cpu(&(src), NR_CPUS)
-static inline int __first_cpu(cpumask_t *srcp, int nbits)
+static inline int __first_cpu(const cpumask_t *srcp, int nbits)
 {
 	return find_first_bit(srcp->bits, nbits);
 }
 
 #define next_cpu(n, src) __next_cpu((n), &(src), NR_CPUS)
-static inline int __next_cpu(int n, cpumask_t *srcp, int nbits)
+static inline int __next_cpu(int n, const cpumask_t *srcp, int nbits)
 {
 	return find_next_bit(srcp->bits, nbits, n+1);
 }