Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 261 insertions, 0 deletions

diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
new file mode 100644
index 00000000000..86dd5502b05
--- /dev/null
+++ b/include/linux/bitmap.h
@@ -0,0 +1,261 @@
+#ifndef __LINUX_BITMAP_H
+#define __LINUX_BITMAP_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+#include <linux/bitops.h>
+#include <linux/string.h>
+
+/*
+ * bitmaps provide bit arrays that consume one or more unsigned
+ * longs.  The bitmap interface and available operations are listed
+ * here, in bitmap.h
+ *
+ * Function implementations generic to all architectures are in
+ * lib/bitmap.c.  Functions implementations that are architecture
+ * specific are in various include/asm-<arch>/bitops.h headers
+ * and other arch/<arch> specific files.
+ *
+ * See lib/bitmap.c for more details.
+ */
+
+/*
+ * The available bitmap operations and their rough meaning in the
+ * case that the bitmap is a single unsigned long are thus:
+ *
+ * bitmap_zero(dst, nbits)                      *dst = 0UL
+ * bitmap_fill(dst, nbits)                      *dst = ~0UL
+ * bitmap_copy(dst, src, nbits)                 *dst = *src
+ * bitmap_and(dst, src1, src2, nbits)           *dst = *src1 & *src2
+ * bitmap_or(dst, src1, src2, nbits)            *dst = *src1 | *src2
+ * bitmap_xor(dst, src1, src2, nbits)           *dst = *src1 ^ *src2
+ * bitmap_andnot(dst, src1, src2, nbits)        *dst = *src1 & ~(*src2)
+ * bitmap_complement(dst, src, nbits)           *dst = ~(*src)
+ * bitmap_equal(src1, src2, nbits)              Are *src1 and *src2 equal?
+ * bitmap_intersects(src1, src2, nbits)         Do *src1 and *src2 overlap?
+ * bitmap_subset(src1, src2, nbits)             Is *src1 a subset of *src2?
+ * bitmap_empty(src, nbits)                     Are all bits zero in *src?
+ * bitmap_full(src, nbits)                      Are all bits set in *src?
+ * bitmap_weight(src, nbits)                    Hamming Weight: number set bits
+ * bitmap_shift_right(dst, src, n, nbits)       *dst = *src >> n
+ * bitmap_shift_left(dst, src, n, nbits)        *dst = *src << n
+ * bitmap_scnprintf(buf, len, src, nbits)       Print bitmap src to buf
+ * bitmap_parse(ubuf, ulen, dst, nbits)         Parse bitmap dst from user buf
+ * bitmap_scnlistprintf(buf, len, src, nbits)   Print bitmap src as list to buf
+ * bitmap_parselist(buf, dst, nbits)            Parse bitmap dst from list
+ */
+
+/*
+ * Also the following operations in asm/bitops.h apply to bitmaps.
+ *
+ * set_bit(bit, addr)                   *addr |= bit
+ * clear_bit(bit, addr)                 *addr &= ~bit
+ * change_bit(bit, addr)                *addr ^= bit
+ * test_bit(bit, addr)                  Is bit set in *addr?
+ * test_and_set_bit(bit, addr)          Set bit and return old value
+ * test_and_clear_bit(bit, addr)        Clear bit and return old value
+ * test_and_change_bit(bit, addr)       Change bit and return old value
+ * find_first_zero_bit(addr, nbits)     Position first zero bit in *addr
+ * find_first_bit(addr, nbits)          Position first set bit in *addr
+ * find_next_zero_bit(addr, nbits, bit) Position next zero bit in *addr >= bit
+ * find_next_bit(addr, nbits, bit)      Position next set bit in *addr >= bit
+ */
+
+/*
+ * The DECLARE_BITMAP(name,bits) macro, in linux/types.h, can be used
+ * to declare an array named 'name' of just enough unsigned longs to
+ * contain all bit positions from 0 to 'bits' - 1.
+ */
+
+/*
+ * lib/bitmap.c provides these functions:
+ */
+
+extern int __bitmap_empty(const unsigned long *bitmap, int bits);
+extern int __bitmap_full(const unsigned long *bitmap, int bits);
+extern int __bitmap_equal(const unsigned long *bitmap1,
+                        const unsigned long *bitmap2, int bits);
+extern void __bitmap_complement(unsigned long *dst, const unsigned long *src,
+                        int bits);
+extern void __bitmap_shift_right(unsigned long *dst,
+                        const unsigned long *src, int shift, int bits);
+extern void __bitmap_shift_left(unsigned long *dst,
+                        const unsigned long *src, int shift, int bits);
+extern void __bitmap_and(unsigned long *dst, const unsigned long *bitmap1,
+                        const unsigned long *bitmap2, int bits);
+extern void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1,
+                        const unsigned long *bitmap2, int bits);
+extern void __bitmap_xor(unsigned long *dst, const unsigned long *bitmap1,
+                        const unsigned long *bitmap2, int bits);
+extern void __bitmap_andnot(unsigned long *dst, const unsigned long *bitmap1,
+                        const unsigned long *bitmap2, int bits);
+extern int __bitmap_intersects(const unsigned long *bitmap1,
+                        const unsigned long *bitmap2, int bits);
+extern int __bitmap_subset(const unsigned long *bitmap1,
+                        const unsigned long *bitmap2, int bits);
+extern int __bitmap_weight(const unsigned long *bitmap, int bits);
+
+extern int bitmap_scnprintf(char *buf, unsigned int len,
+                        const unsigned long *src, int nbits);
+extern int bitmap_parse(const char __user *ubuf, unsigned int ulen,
+                        unsigned long *dst, int nbits);
+extern int bitmap_scnlistprintf(char *buf, unsigned int len,
+                        const unsigned long *src, int nbits);
+extern int bitmap_parselist(const char *buf, unsigned long *maskp,
+                        int nmaskbits);
+extern int bitmap_find_free_region(unsigned long *bitmap, int bits, int order);
+extern void bitmap_release_region(unsigned long *bitmap, int pos, int order);
+extern int bitmap_allocate_region(unsigned long *bitmap, int pos, int order);
+
+#define BITMAP_LAST_WORD_MASK(nbits)                                    \
+(                                                                       \
+        ((nbits) % BITS_PER_LONG) ?                                     \
+                (1UL<<((nbits) % BITS_PER_LONG))-1 : ~0UL               \
+)
+
+static inline void bitmap_zero(unsigned long *dst, int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                *dst = 0UL;
+        else {
+                int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
+                memset(dst, 0, len);
+        }
+}
+
+static inline void bitmap_fill(unsigned long *dst, int nbits)
+{
+        size_t nlongs = BITS_TO_LONGS(nbits);
+        if (nlongs > 1) {
+                int len = (nlongs - 1) * sizeof(unsigned long);
+                memset(dst, 0xff,  len);
+        }
+        dst[nlongs - 1] = BITMAP_LAST_WORD_MASK(nbits);
+}
+
+static inline void bitmap_copy(unsigned long *dst, const unsigned long *src,
+                        int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                *dst = *src;
+        else {
+                int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
+                memcpy(dst, src, len);
+        }
+}
+
+static inline void bitmap_and(unsigned long *dst, const unsigned long *src1,
+                        const unsigned long *src2, int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                *dst = *src1 & *src2;
+        else
+                __bitmap_and(dst, src1, src2, nbits);
+}
+
+static inline void bitmap_or(unsigned long *dst, const unsigned long *src1,
+                        const unsigned long *src2, int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                *dst = *src1 | *src2;
+        else
+                __bitmap_or(dst, src1, src2, nbits);
+}
+
+static inline void bitmap_xor(unsigned long *dst, const unsigned long *src1,
+                        const unsigned long *src2, int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                *dst = *src1 ^ *src2;
+        else
+                __bitmap_xor(dst, src1, src2, nbits);
+}
+
+static inline void bitmap_andnot(unsigned long *dst, const unsigned long *src1,
+                        const unsigned long *src2, int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                *dst = *src1 & ~(*src2);
+        else
+                __bitmap_andnot(dst, src1, src2, nbits);
+}
+
+static inline void bitmap_complement(unsigned long *dst, const unsigned long *src,
+                        int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                *dst = ~(*src) & BITMAP_LAST_WORD_MASK(nbits);
+        else
+                __bitmap_complement(dst, src, nbits);
+}
+
+static inline int bitmap_equal(const unsigned long *src1,
+                        const unsigned long *src2, int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                return ! ((*src1 ^ *src2) & BITMAP_LAST_WORD_MASK(nbits));
+        else
+                return __bitmap_equal(src1, src2, nbits);
+}
+
+static inline int bitmap_intersects(const unsigned long *src1,
+                        const unsigned long *src2, int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                return ((*src1 & *src2) & BITMAP_LAST_WORD_MASK(nbits)) != 0;
+        else
+                return __bitmap_intersects(src1, src2, nbits);
+}
+
+static inline int bitmap_subset(const unsigned long *src1,
+                        const unsigned long *src2, int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                return ! ((*src1 & ~(*src2)) & BITMAP_LAST_WORD_MASK(nbits));
+        else
+                return __bitmap_subset(src1, src2, nbits);
+}
+
+static inline int bitmap_empty(const unsigned long *src, int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                return ! (*src & BITMAP_LAST_WORD_MASK(nbits));
+        else
+                return __bitmap_empty(src, nbits);
+}
+
+static inline int bitmap_full(const unsigned long *src, int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                return ! (~(*src) & BITMAP_LAST_WORD_MASK(nbits));
+        else
+                return __bitmap_full(src, nbits);
+}
+
+static inline int bitmap_weight(const unsigned long *src, int nbits)
+{
+        return __bitmap_weight(src, nbits);
+}
+
+static inline void bitmap_shift_right(unsigned long *dst,
+                        const unsigned long *src, int n, int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                *dst = *src >> n;
+        else
+                __bitmap_shift_right(dst, src, n, nbits);
+}
+
+static inline void bitmap_shift_left(unsigned long *dst,
+                        const unsigned long *src, int n, int nbits)
+{
+        if (nbits <= BITS_PER_LONG)
+                *dst = (*src << n) & BITMAP_LAST_WORD_MASK(nbits);
+        else
+                __bitmap_shift_left(dst, src, n, nbits);
+}
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __LINUX_BITMAP_H */