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authorLinus Torvalds <torvalds@linux-foundation.org>2021-05-07 00:34:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-05-07 00:34:51 -0700
commita48b0872e69428d3d02994dcfad3519f01def7fa (patch)
tree20617cba7bbb16d36faf79204ca69abc214d6c38 /tools/include
parent05da1f643f00ae9aabb8318709e40579789b7c64 (diff)
parentbaf2f90ba416cd887d7f54cc877d8764f6775de2 (diff)
Merge branch 'akpm' (patches from Andrew)
Merge yet more updates from Andrew Morton: "This is everything else from -mm for this merge window. 90 patches. Subsystems affected by this patch series: mm (cleanups and slub), alpha, procfs, sysctl, misc, core-kernel, bitmap, lib, compat, checkpatch, epoll, isofs, nilfs2, hpfs, exit, fork, kexec, gcov, panic, delayacct, gdb, resource, selftests, async, initramfs, ipc, drivers/char, and spelling" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (90 commits) mm: fix typos in comments mm: fix typos in comments treewide: remove editor modelines and cruft ipc/sem.c: spelling fix fs: fat: fix spelling typo of values kernel/sys.c: fix typo kernel/up.c: fix typo kernel/user_namespace.c: fix typos kernel/umh.c: fix some spelling mistakes include/linux/pgtable.h: few spelling fixes mm/slab.c: fix spelling mistake "disired" -> "desired" scripts/spelling.txt: add "overflw" scripts/spelling.txt: Add "diabled" typo scripts/spelling.txt: add "overlfow" arm: print alloc free paths for address in registers mm/vmalloc: remove vwrite() mm: remove xlate_dev_kmem_ptr() drivers/char: remove /dev/kmem for good mm: fix some typos and code style problems ipc/sem.c: mundane typo fixes ...
Diffstat (limited to 'tools/include')
-rw-r--r--tools/include/asm-generic/bitops/find.h85
-rw-r--r--tools/include/asm-generic/bitsperlong.h3
-rw-r--r--tools/include/linux/bitmap.h18
3 files changed, 84 insertions, 22 deletions
diff --git a/tools/include/asm-generic/bitops/find.h b/tools/include/asm-generic/bitops/find.h
index 16ed1982cb34..6481fd11012a 100644
--- a/tools/include/asm-generic/bitops/find.h
+++ b/tools/include/asm-generic/bitops/find.h
@@ -2,6 +2,13 @@
#ifndef _TOOLS_LINUX_ASM_GENERIC_BITOPS_FIND_H_
#define _TOOLS_LINUX_ASM_GENERIC_BITOPS_FIND_H_
+extern unsigned long _find_next_bit(const unsigned long *addr1,
+ const unsigned long *addr2, unsigned long nbits,
+ unsigned long start, unsigned long invert, unsigned long le);
+extern unsigned long _find_first_bit(const unsigned long *addr, unsigned long size);
+extern unsigned long _find_first_zero_bit(const unsigned long *addr, unsigned long size);
+extern unsigned long _find_last_bit(const unsigned long *addr, unsigned long size);
+
#ifndef find_next_bit
/**
* find_next_bit - find the next set bit in a memory region
@@ -12,8 +19,22 @@
* Returns the bit number for the next set bit
* If no bits are set, returns @size.
*/
-extern unsigned long find_next_bit(const unsigned long *addr, unsigned long
- size, unsigned long offset);
+static inline
+unsigned long find_next_bit(const unsigned long *addr, unsigned long size,
+ unsigned long offset)
+{
+ if (small_const_nbits(size)) {
+ unsigned long val;
+
+ if (unlikely(offset >= size))
+ return size;
+
+ val = *addr & GENMASK(size - 1, offset);
+ return val ? __ffs(val) : size;
+ }
+
+ return _find_next_bit(addr, NULL, size, offset, 0UL, 0);
+}
#endif
#ifndef find_next_and_bit
@@ -27,13 +48,26 @@ extern unsigned long find_next_bit(const unsigned long *addr, unsigned long
* Returns the bit number for the next set bit
* If no bits are set, returns @size.
*/
-extern unsigned long find_next_and_bit(const unsigned long *addr1,
+static inline
+unsigned long find_next_and_bit(const unsigned long *addr1,
const unsigned long *addr2, unsigned long size,
- unsigned long offset);
+ unsigned long offset)
+{
+ if (small_const_nbits(size)) {
+ unsigned long val;
+
+ if (unlikely(offset >= size))
+ return size;
+
+ val = *addr1 & *addr2 & GENMASK(size - 1, offset);
+ return val ? __ffs(val) : size;
+ }
+
+ return _find_next_bit(addr1, addr2, size, offset, 0UL, 0);
+}
#endif
#ifndef find_next_zero_bit
-
/**
* find_next_zero_bit - find the next cleared bit in a memory region
* @addr: The address to base the search on
@@ -43,8 +77,22 @@ extern unsigned long find_next_and_bit(const unsigned long *addr1,
* Returns the bit number of the next zero bit
* If no bits are zero, returns @size.
*/
+static inline
unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size,
- unsigned long offset);
+ unsigned long offset)
+{
+ if (small_const_nbits(size)) {
+ unsigned long val;
+
+ if (unlikely(offset >= size))
+ return size;
+
+ val = *addr | ~GENMASK(size - 1, offset);
+ return val == ~0UL ? size : ffz(val);
+ }
+
+ return _find_next_bit(addr, NULL, size, offset, ~0UL, 0);
+}
#endif
#ifndef find_first_bit
@@ -57,8 +105,17 @@ unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size,
* Returns the bit number of the first set bit.
* If no bits are set, returns @size.
*/
-extern unsigned long find_first_bit(const unsigned long *addr,
- unsigned long size);
+static inline
+unsigned long find_first_bit(const unsigned long *addr, unsigned long size)
+{
+ if (small_const_nbits(size)) {
+ unsigned long val = *addr & GENMASK(size - 1, 0);
+
+ return val ? __ffs(val) : size;
+ }
+
+ return _find_first_bit(addr, size);
+}
#endif /* find_first_bit */
@@ -72,7 +129,17 @@ extern unsigned long find_first_bit(const unsigned long *addr,
* Returns the bit number of the first cleared bit.
* If no bits are zero, returns @size.
*/
-unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size);
+static inline
+unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size)
+{
+ if (small_const_nbits(size)) {
+ unsigned long val = *addr | ~GENMASK(size - 1, 0);
+
+ return val == ~0UL ? size : ffz(val);
+ }
+
+ return _find_first_zero_bit(addr, size);
+}
#endif
#endif /*_TOOLS_LINUX_ASM_GENERIC_BITOPS_FIND_H_ */
diff --git a/tools/include/asm-generic/bitsperlong.h b/tools/include/asm-generic/bitsperlong.h
index 8f2283052333..2093d56ddd11 100644
--- a/tools/include/asm-generic/bitsperlong.h
+++ b/tools/include/asm-generic/bitsperlong.h
@@ -18,4 +18,7 @@
#define BITS_PER_LONG_LONG 64
#endif
+#define small_const_nbits(nbits) \
+ (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG && (nbits) > 0)
+
#endif /* __ASM_GENERIC_BITS_PER_LONG */
diff --git a/tools/include/linux/bitmap.h b/tools/include/linux/bitmap.h
index 477a1cae513f..330dbf7509cc 100644
--- a/tools/include/linux/bitmap.h
+++ b/tools/include/linux/bitmap.h
@@ -20,17 +20,9 @@ int __bitmap_equal(const unsigned long *bitmap1,
void bitmap_clear(unsigned long *map, unsigned int start, int len);
#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1)))
+#define BITMAP_LAST_WORD_MASK(nbits) (~0UL >> (-(nbits) & (BITS_PER_LONG - 1)))
-#define BITMAP_LAST_WORD_MASK(nbits) \
-( \
- ((nbits) % BITS_PER_LONG) ? \
- (1UL<<((nbits) % BITS_PER_LONG))-1 : ~0UL \
-)
-
-#define small_const_nbits(nbits) \
- (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)
-
-static inline void bitmap_zero(unsigned long *dst, int nbits)
+static inline void bitmap_zero(unsigned long *dst, unsigned int nbits)
{
if (small_const_nbits(nbits))
*dst = 0UL;
@@ -66,7 +58,7 @@ static inline int bitmap_full(const unsigned long *src, unsigned int nbits)
return find_first_zero_bit(src, nbits) == nbits;
}
-static inline int bitmap_weight(const unsigned long *src, int nbits)
+static inline int bitmap_weight(const unsigned long *src, unsigned int nbits)
{
if (small_const_nbits(nbits))
return hweight_long(*src & BITMAP_LAST_WORD_MASK(nbits));
@@ -74,7 +66,7 @@ static inline int bitmap_weight(const unsigned long *src, int nbits)
}
static inline void bitmap_or(unsigned long *dst, const unsigned long *src1,
- const unsigned long *src2, int nbits)
+ const unsigned long *src2, unsigned int nbits)
{
if (small_const_nbits(nbits))
*dst = *src1 | *src2;
@@ -141,7 +133,7 @@ static inline void bitmap_free(unsigned long *bitmap)
* @buf: buffer to store output
* @size: size of @buf
*/
-size_t bitmap_scnprintf(unsigned long *bitmap, int nbits,
+size_t bitmap_scnprintf(unsigned long *bitmap, unsigned int nbits,
char *buf, size_t size);
/**