diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/bitfield.h | 18 | ||||
| -rw-r--r-- | include/linux/bitmap-str.h | 1 | ||||
| -rw-r--r-- | include/linux/bitrev.h | 20 | ||||
| -rw-r--r-- | include/linux/cpumask.h | 7 | ||||
| -rw-r--r-- | include/linux/find.h | 8 |
5 files changed, 30 insertions, 24 deletions
diff --git a/include/linux/bitfield.h b/include/linux/bitfield.h index 54aeeef1f0ec..14f86e455a67 100644 --- a/include/linux/bitfield.h +++ b/include/linux/bitfield.h @@ -44,7 +44,7 @@ * FIELD_MODIFY(REG_FIELD_C, ®, c); */ -#define __bf_shf(x) (__builtin_ffsll(x) - 1) +#define __bf_shf __builtin_ctzll #define __scalar_type_to_unsigned_cases(type) \ unsigned type: (unsigned type)0, \ @@ -179,6 +179,22 @@ }) /** + * FIELD_GET_SIGNED() - extract a signed bitfield element + * @mask: shifted mask defining the field's length and position + * @reg: value of entire bitfield + * + * Returns the sign-extended field specified by @_mask from the + * bitfield passed in as @reg by masking and shifting it down. + */ +#define FIELD_GET_SIGNED(mask, reg) \ + ({ \ + __BF_FIELD_CHECK(mask, reg, 0U, "FIELD_GET_SIGNED: "); \ + ((__signed_scalar_typeof(mask)) \ + (((long long)(reg) << __builtin_clzll(mask)) >> \ + (__builtin_clzll(mask) + __builtin_ctzll(mask)))); \ + }) + +/** * FIELD_MODIFY() - modify a bitfield element * @_mask: shifted mask defining the field's length and position * @_reg_p: pointer to the memory that should be updated diff --git a/include/linux/bitmap-str.h b/include/linux/bitmap-str.h index 53d3e1b32d3d..abe7a69a846f 100644 --- a/include/linux/bitmap-str.h +++ b/include/linux/bitmap-str.h @@ -5,7 +5,6 @@ #include <linux/types.h> int bitmap_parse_user(const char __user *ubuf, unsigned int ulen, unsigned long *dst, int nbits); -int bitmap_print_to_pagebuf(bool list, char *buf, const unsigned long *maskp, int nmaskbits); int bitmap_print_bitmask_to_buf(char *buf, const unsigned long *maskp, int nmaskbits, loff_t off, size_t count); int bitmap_print_list_to_buf(char *buf, const unsigned long *maskp, int nmaskbits, diff --git a/include/linux/bitrev.h b/include/linux/bitrev.h index d35b8ec1c485..11620a70e776 100644 --- a/include/linux/bitrev.h +++ b/include/linux/bitrev.h @@ -12,22 +12,10 @@ #define __bitrev8 __arch_bitrev8 #else -extern u8 const byte_rev_table[256]; -static inline u8 __bitrev8(u8 byte) -{ - return byte_rev_table[byte]; -} - -static inline u16 __bitrev16(u16 x) -{ - return (__bitrev8(x & 0xff) << 8) | __bitrev8(x >> 8); -} - -static inline u32 __bitrev32(u32 x) -{ - return (__bitrev16(x & 0xffff) << 16) | __bitrev16(x >> 16); -} - +#include <asm-generic/bitops/__bitrev.h> +#define __bitrev32 generic___bitrev32 +#define __bitrev16 generic___bitrev16 +#define __bitrev8 generic___bitrev8 #endif /* CONFIG_HAVE_ARCH_BITREVERSE */ #define __bitrev8x4(x) (__bitrev32(swab32(x))) diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 80211900f373..d3cda0544954 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -13,8 +13,10 @@ #include <linux/cpumask_types.h> #include <linux/gfp_types.h> #include <linux/numa.h> +#include <linux/sprintf.h> #include <linux/threads.h> #include <linux/types.h> +#include <vdso/page.h> #include <asm/bug.h> @@ -1326,8 +1328,9 @@ static __always_inline bool cpu_dying(unsigned int cpu) static __always_inline ssize_t cpumap_print_to_pagebuf(bool list, char *buf, const struct cpumask *mask) { - return bitmap_print_to_pagebuf(list, buf, cpumask_bits(mask), - nr_cpu_ids); + /* Opencode offset_in_page(buf) to not include linux/mm.h */ + return scnprintf(buf, PAGE_SIZE - ((unsigned long)buf & ~PAGE_MASK), + list ? "%*pbl\n" : "%*pb\n", cpumask_pr_args(mask)); } /** diff --git a/include/linux/find.h b/include/linux/find.h index 6c2be8ca615d..a129f8205fb6 100644 --- a/include/linux/find.h +++ b/include/linux/find.h @@ -249,7 +249,7 @@ unsigned long find_nth_bit(const unsigned long *addr, unsigned long size, unsign * @n: The number of set bit, which position is needed, counting from 0 * * Returns the bit number of the N'th set bit. - * If no such, returns @size. + * If no such, returns >= @size. */ static __always_inline unsigned long find_nth_and_bit(const unsigned long *addr1, const unsigned long *addr2, @@ -277,7 +277,7 @@ unsigned long find_nth_and_bit(const unsigned long *addr1, const unsigned long * * @n: The number of set bit, which position is needed, counting from 0 * * Returns the bit number of the N'th set bit. - * If no such, returns @size. + * If no such, returns >= @size. */ static __always_inline unsigned long find_nth_and_andnot_bit(const unsigned long *addr1, @@ -655,8 +655,8 @@ unsigned long find_next_bit_le(const void *addr, unsigned /** * for_each_clear_bitrange_from - iterate over all unset bit ranges [b; e) - * @b: bit offset of start of current bitrange (first set bit); must be initialized - * @e: bit offset of end of current bitrange (first unset bit) + * @b: bit offset of start of current bitrange (first unset bit); must be initialized + * @e: bit offset of end of current bitrange (first set bit) * @addr: bitmap address to base the search on * @size: bitmap size in number of bits */ |