Linux-2.6.12-rc2v2.6.12-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, 537 insertions, 0 deletions

diff --git a/include/asm-sparc/bitops.h b/include/asm-sparc/bitops.h
new file mode 100644
index 000000000000..bfbd795a0a80
--- /dev/null
+++ b/include/asm-sparc/bitops.h
@@ -0,0 +1,537 @@
+/* $Id: bitops.h,v 1.67 2001/11/19 18:36:34 davem Exp $
+ * bitops.h: Bit string operations on the Sparc.
+ *
+ * Copyright 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright 1996 Eddie C. Dost   (ecd@skynet.be)
+ * Copyright 2001 Anton Blanchard (anton@samba.org)
+ */
+
+#ifndef _SPARC_BITOPS_H
+#define _SPARC_BITOPS_H
+
+#include <linux/compiler.h>
+#include <asm/byteorder.h>
+
+#ifdef __KERNEL__
+
+/*
+ * Set bit 'nr' in 32-bit quantity at address 'addr' where bit '0'
+ * is in the highest of the four bytes and bit '31' is the high bit
+ * within the first byte. Sparc is BIG-Endian. Unless noted otherwise
+ * all bit-ops return 0 if bit was previously clear and != 0 otherwise.
+ */
+static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *addr)
+{
+        register unsigned long mask asm("g2");
+        register unsigned long *ADDR asm("g1");
+        register int tmp1 asm("g3");
+        register int tmp2 asm("g4");
+        register int tmp3 asm("g5");
+        register int tmp4 asm("g7");
+
+        ADDR = ((unsigned long *) addr) + (nr >> 5);
+        mask = 1 << (nr & 31);
+
+        __asm__ __volatile__(
+        "mov    %%o7, %%g4\n\t"
+        "call   ___set_bit\n\t"
+        " add   %%o7, 8, %%o7\n"
+        : "=&r" (mask), "=r" (tmp1), "=r" (tmp2), "=r" (tmp3), "=r" (tmp4)
+        : "0" (mask), "r" (ADDR)
+        : "memory", "cc");
+
+        return mask != 0;
+}
+
+static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
+{
+        register unsigned long mask asm("g2");
+        register unsigned long *ADDR asm("g1");
+        register int tmp1 asm("g3");
+        register int tmp2 asm("g4");
+        register int tmp3 asm("g5");
+        register int tmp4 asm("g7");
+
+        ADDR = ((unsigned long *) addr) + (nr >> 5);
+        mask = 1 << (nr & 31);
+
+        __asm__ __volatile__(
+        "mov    %%o7, %%g4\n\t"
+        "call   ___set_bit\n\t"
+        " add   %%o7, 8, %%o7\n"
+        : "=&r" (mask), "=r" (tmp1), "=r" (tmp2), "=r" (tmp3), "=r" (tmp4)
+        : "0" (mask), "r" (ADDR)
+        : "memory", "cc");
+}
+
+static inline int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr)
+{
+        register unsigned long mask asm("g2");
+        register unsigned long *ADDR asm("g1");
+        register int tmp1 asm("g3");
+        register int tmp2 asm("g4");
+        register int tmp3 asm("g5");
+        register int tmp4 asm("g7");
+
+        ADDR = ((unsigned long *) addr) + (nr >> 5);
+        mask = 1 << (nr & 31);
+
+        __asm__ __volatile__(
+        "mov    %%o7, %%g4\n\t"
+        "call   ___clear_bit\n\t"
+        " add   %%o7, 8, %%o7\n"
+        : "=&r" (mask), "=r" (tmp1), "=r" (tmp2), "=r" (tmp3), "=r" (tmp4)
+        : "0" (mask), "r" (ADDR)
+        : "memory", "cc");
+
+        return mask != 0;
+}
+
+static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
+{
+        register unsigned long mask asm("g2");
+        register unsigned long *ADDR asm("g1");
+        register int tmp1 asm("g3");
+        register int tmp2 asm("g4");
+        register int tmp3 asm("g5");
+        register int tmp4 asm("g7");
+
+        ADDR = ((unsigned long *) addr) + (nr >> 5);
+        mask = 1 << (nr & 31);
+
+        __asm__ __volatile__(
+        "mov    %%o7, %%g4\n\t"
+        "call   ___clear_bit\n\t"
+        " add   %%o7, 8, %%o7\n"
+        : "=&r" (mask), "=r" (tmp1), "=r" (tmp2), "=r" (tmp3), "=r" (tmp4)
+        : "0" (mask), "r" (ADDR)
+        : "memory", "cc");
+}
+
+static inline int test_and_change_bit(unsigned long nr, volatile unsigned long *addr)
+{
+        register unsigned long mask asm("g2");
+        register unsigned long *ADDR asm("g1");
+        register int tmp1 asm("g3");
+        register int tmp2 asm("g4");
+        register int tmp3 asm("g5");
+        register int tmp4 asm("g7");
+
+        ADDR = ((unsigned long *) addr) + (nr >> 5);
+        mask = 1 << (nr & 31);
+
+        __asm__ __volatile__(
+        "mov    %%o7, %%g4\n\t"
+        "call   ___change_bit\n\t"
+        " add   %%o7, 8, %%o7\n"
+        : "=&r" (mask), "=r" (tmp1), "=r" (tmp2), "=r" (tmp3), "=r" (tmp4)
+        : "0" (mask), "r" (ADDR)
+        : "memory", "cc");
+
+        return mask != 0;
+}
+
+static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
+{
+        register unsigned long mask asm("g2");
+        register unsigned long *ADDR asm("g1");
+        register int tmp1 asm("g3");
+        register int tmp2 asm("g4");
+        register int tmp3 asm("g5");
+        register int tmp4 asm("g7");
+
+        ADDR = ((unsigned long *) addr) + (nr >> 5);
+        mask = 1 << (nr & 31);
+
+        __asm__ __volatile__(
+        "mov    %%o7, %%g4\n\t"
+        "call   ___change_bit\n\t"
+        " add   %%o7, 8, %%o7\n"
+        : "=&r" (mask), "=r" (tmp1), "=r" (tmp2), "=r" (tmp3), "=r" (tmp4)
+        : "0" (mask), "r" (ADDR)
+        : "memory", "cc");
+}
+
+/*
+ * non-atomic versions
+ */
+static inline void __set_bit(int nr, volatile unsigned long *addr)
+{
+        unsigned long mask = 1UL << (nr & 0x1f);
+        unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
+
+        *p |= mask;
+}
+
+static inline void __clear_bit(int nr, volatile unsigned long *addr)
+{
+        unsigned long mask = 1UL << (nr & 0x1f);
+        unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
+
+        *p &= ~mask;
+}
+
+static inline void __change_bit(int nr, volatile unsigned long *addr)
+{
+        unsigned long mask = 1UL << (nr & 0x1f);
+        unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
+
+        *p ^= mask;
+}
+
+static inline int __test_and_set_bit(int nr, volatile unsigned long *addr)
+{
+        unsigned long mask = 1UL << (nr & 0x1f);
+        unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
+        unsigned long old = *p;
+
+        *p = old | mask;
+        return (old & mask) != 0;
+}
+
+static inline int __test_and_clear_bit(int nr, volatile unsigned long *addr)
+{
+        unsigned long mask = 1UL << (nr & 0x1f);
+        unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
+        unsigned long old = *p;
+
+        *p = old & ~mask;
+        return (old & mask) != 0;
+}
+
+static inline int __test_and_change_bit(int nr, volatile unsigned long *addr)
+{
+        unsigned long mask = 1UL << (nr & 0x1f);
+        unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
+        unsigned long old = *p;
+
+        *p = old ^ mask;
+        return (old & mask) != 0;
+}
+
+#define smp_mb__before_clear_bit()      do { } while(0)
+#define smp_mb__after_clear_bit()       do { } while(0)
+
+/* The following routine need not be atomic. */
+static inline int test_bit(int nr, __const__ volatile unsigned long *addr)
+{
+        return (1UL & (((unsigned long *)addr)[nr >> 5] >> (nr & 31))) != 0UL;
+}
+
+/* The easy/cheese version for now. */
+static inline unsigned long ffz(unsigned long word)
+{
+        unsigned long result = 0;
+
+        while(word & 1) {
+                result++;
+                word >>= 1;
+        }
+        return result;
+}
+
+/**
+ * __ffs - find first bit in word.
+ * @word: The word to search
+ *
+ * Undefined if no bit exists, so code should check against 0 first.
+ */
+static inline int __ffs(unsigned long word)
+{
+        int num = 0;
+
+        if ((word & 0xffff) == 0) {
+                num += 16;
+                word >>= 16;
+        }
+        if ((word & 0xff) == 0) {
+                num += 8;
+                word >>= 8;
+        }
+        if ((word & 0xf) == 0) {
+                num += 4;
+                word >>= 4;
+        }
+        if ((word & 0x3) == 0) {
+                num += 2;
+                word >>= 2;
+        }
+        if ((word & 0x1) == 0)
+                num += 1;
+        return num;
+}
+
+/*
+ * Every architecture must define this function. It's the fastest
+ * way of searching a 140-bit bitmap where the first 100 bits are
+ * unlikely to be set. It's guaranteed that at least one of the 140
+ * bits is cleared.
+ */
+static inline int sched_find_first_bit(unsigned long *b)
+{
+
+        if (unlikely(b[0]))
+                return __ffs(b[0]);
+        if (unlikely(b[1]))
+                return __ffs(b[1]) + 32;
+        if (unlikely(b[2]))
+                return __ffs(b[2]) + 64;
+        if (b[3])
+                return __ffs(b[3]) + 96;
+        return __ffs(b[4]) + 128;
+}
+
+/*
+ * ffs: find first bit set. This is defined the same way as
+ * the libc and compiler builtin ffs routines, therefore
+ * differs in spirit from the above ffz (man ffs).
+ */
+static inline int ffs(int x)
+{
+        if (!x)
+                return 0;
+        return __ffs((unsigned long)x) + 1;
+}
+
+/*
+ * fls: find last (most-significant) bit set.
+ * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
+ */
+#define fls(x) generic_fls(x)
+
+/*
+ * hweightN: returns the hamming weight (i.e. the number
+ * of bits set) of a N-bit word
+ */
+#define hweight32(x) generic_hweight32(x)
+#define hweight16(x) generic_hweight16(x)
+#define hweight8(x) generic_hweight8(x)
+
+/*
+ * find_next_zero_bit() finds the first zero bit in a bit string of length
+ * 'size' bits, starting the search at bit 'offset'. This is largely based
+ * on Linus's ALPHA routines, which are pretty portable BTW.
+ */
+static inline unsigned long find_next_zero_bit(const unsigned long *addr,
+    unsigned long size, unsigned long offset)
+{
+        const unsigned long *p = addr + (offset >> 5);
+        unsigned long result = offset & ~31UL;
+        unsigned long tmp;
+
+        if (offset >= size)
+                return size;
+        size -= result;
+        offset &= 31UL;
+        if (offset) {
+                tmp = *(p++);
+                tmp |= ~0UL >> (32-offset);
+                if (size < 32)
+                        goto found_first;
+                if (~tmp)
+                        goto found_middle;
+                size -= 32;
+                result += 32;
+        }
+        while (size & ~31UL) {
+                if (~(tmp = *(p++)))
+                        goto found_middle;
+                result += 32;
+                size -= 32;
+        }
+        if (!size)
+                return result;
+        tmp = *p;
+
+found_first:
+        tmp |= ~0UL << size;
+        if (tmp == ~0UL)        /* Are any bits zero? */
+                return result + size; /* Nope. */
+found_middle:
+        return result + ffz(tmp);
+}
+
+/*
+ * Linus sez that gcc can optimize the following correctly, we'll see if this
+ * holds on the Sparc as it does for the ALPHA.
+ */
+#define find_first_zero_bit(addr, size) \
+        find_next_zero_bit((addr), (size), 0)
+
+/**
+ * find_next_bit - find the first set bit in a memory region
+ * @addr: The address to base the search on
+ * @offset: The bitnumber to start searching at
+ * @size: The maximum size to search
+ *
+ * Scheduler induced bitop, do not use.
+ */
+static inline int find_next_bit(const unsigned long *addr, int size, int offset)
+{
+        const unsigned long *p = addr + (offset >> 5);
+        int num = offset & ~0x1f;
+        unsigned long word;
+
+        word = *p++;
+        word &= ~((1 << (offset & 0x1f)) - 1);
+        while (num < size) {
+                if (word != 0) {
+                        return __ffs(word) + num;
+                }
+                word = *p++;
+                num += 0x20;
+        }
+        return num;
+}
+
+/**
+ * find_first_bit - find the first set bit in a memory region
+ * @addr: The address to start the search at
+ * @size: The maximum size to search
+ *
+ * Returns the bit-number of the first set bit, not the number of the byte
+ * containing a bit.
+ */
+#define find_first_bit(addr, size) \
+        find_next_bit((addr), (size), 0)
+
+/*
+ */
+static inline int test_le_bit(int nr, __const__ unsigned long * addr)
+{
+        __const__ unsigned char *ADDR = (__const__ unsigned char *) addr;
+        return (ADDR[nr >> 3] >> (nr & 7)) & 1;
+}
+
+/*
+ * non-atomic versions
+ */
+static inline void __set_le_bit(int nr, unsigned long *addr)
+{
+        unsigned char *ADDR = (unsigned char *)addr;
+
+        ADDR += nr >> 3;
+        *ADDR |= 1 << (nr & 0x07);
+}
+
+static inline void __clear_le_bit(int nr, unsigned long *addr)
+{
+        unsigned char *ADDR = (unsigned char *)addr;
+
+        ADDR += nr >> 3;
+        *ADDR &= ~(1 << (nr & 0x07));
+}
+
+static inline int __test_and_set_le_bit(int nr, unsigned long *addr)
+{
+        int mask, retval;
+        unsigned char *ADDR = (unsigned char *)addr;
+
+        ADDR += nr >> 3;
+        mask = 1 << (nr & 0x07);
+        retval = (mask & *ADDR) != 0;
+        *ADDR |= mask;
+        return retval;
+}
+
+static inline int __test_and_clear_le_bit(int nr, unsigned long *addr)
+{
+        int mask, retval;
+        unsigned char *ADDR = (unsigned char *)addr;
+
+        ADDR += nr >> 3;
+        mask = 1 << (nr & 0x07);
+        retval = (mask & *ADDR) != 0;
+        *ADDR &= ~mask;
+        return retval;
+}
+
+static inline unsigned long find_next_zero_le_bit(const unsigned long *addr,
+    unsigned long size, unsigned long offset)
+{
+        const unsigned long *p = addr + (offset >> 5);
+        unsigned long result = offset & ~31UL;
+        unsigned long tmp;
+
+        if (offset >= size)
+                return size;
+        size -= result;
+        offset &= 31UL;
+        if(offset) {
+                tmp = *(p++);
+                tmp |= __swab32(~0UL >> (32-offset));
+                if(size < 32)
+                        goto found_first;
+                if(~tmp)
+                        goto found_middle;
+                size -= 32;
+                result += 32;
+        }
+        while(size & ~31UL) {
+                if(~(tmp = *(p++)))
+                        goto found_middle;
+                result += 32;
+                size -= 32;
+        }
+        if(!size)
+                return result;
+        tmp = *p;
+
+found_first:
+        tmp = __swab32(tmp) | (~0UL << size);
+        if (tmp == ~0UL)        /* Are any bits zero? */
+                return result + size; /* Nope. */
+        return result + ffz(tmp);
+
+found_middle:
+        return result + ffz(__swab32(tmp));
+}
+
+#define find_first_zero_le_bit(addr, size) \
+        find_next_zero_le_bit((addr), (size), 0)
+
+#define ext2_set_bit(nr,addr)   \
+        __test_and_set_le_bit((nr),(unsigned long *)(addr))
+#define ext2_clear_bit(nr,addr) \
+        __test_and_clear_le_bit((nr),(unsigned long *)(addr))
+
+#define ext2_set_bit_atomic(lock, nr, addr)             \
+        ({                                              \
+                int ret;                                \
+                spin_lock(lock);                        \
+                ret = ext2_set_bit((nr), (unsigned long *)(addr)); \
+                spin_unlock(lock);                      \
+                ret;                                    \
+        })
+
+#define ext2_clear_bit_atomic(lock, nr, addr)           \
+        ({                                              \
+                int ret;                                \
+                spin_lock(lock);                        \
+                ret = ext2_clear_bit((nr), (unsigned long *)(addr)); \
+                spin_unlock(lock);                      \
+                ret;                                    \
+        })
+
+#define ext2_test_bit(nr,addr)  \
+        test_le_bit((nr),(unsigned long *)(addr))
+#define ext2_find_first_zero_bit(addr, size) \
+        find_first_zero_le_bit((unsigned long *)(addr), (size))
+#define ext2_find_next_zero_bit(addr, size, off) \
+        find_next_zero_le_bit((unsigned long *)(addr), (size), (off))
+
+/* Bitmap functions for the minix filesystem.  */
+#define minix_test_and_set_bit(nr,addr) \
+        test_and_set_bit((nr),(unsigned long *)(addr))
+#define minix_set_bit(nr,addr)          \
+        set_bit((nr),(unsigned long *)(addr))
+#define minix_test_and_clear_bit(nr,addr) \
+        test_and_clear_bit((nr),(unsigned long *)(addr))
+#define minix_test_bit(nr,addr)         \
+        test_bit((nr),(unsigned long *)(addr))
+#define minix_find_first_zero_bit(addr,size) \
+        find_first_zero_bit((unsigned long *)(addr),(size))
+
+#endif /* __KERNEL__ */
+
+#endif /* defined(_SPARC_BITOPS_H) */