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, 436 insertions, 0 deletions

diff --git a/include/asm-s390/uaccess.h b/include/asm-s390/uaccess.h
new file mode 100644
index 000000000000..a7f43a251f81
--- /dev/null
+++ b/include/asm-s390/uaccess.h
@@ -0,0 +1,436 @@
+/*
+ *  include/asm-s390/uaccess.h
+ *
+ *  S390 version
+ *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Hartmut Penner (hp@de.ibm.com),
+ *               Martin Schwidefsky (schwidefsky@de.ibm.com)
+ *
+ *  Derived from "include/asm-i386/uaccess.h"
+ */
+#ifndef __S390_UACCESS_H
+#define __S390_UACCESS_H
+
+/*
+ * User space memory access functions
+ */
+#include <linux/sched.h>
+#include <linux/errno.h>
+
+#define VERIFY_READ     0
+#define VERIFY_WRITE    1
+
+
+/*
+ * The fs value determines whether argument validity checking should be
+ * performed or not.  If get_fs() == USER_DS, checking is performed, with
+ * get_fs() == KERNEL_DS, checking is bypassed.
+ *
+ * For historical reasons, these macros are grossly misnamed.
+ */
+
+#define MAKE_MM_SEG(a)  ((mm_segment_t) { (a) })
+
+
+#define KERNEL_DS       MAKE_MM_SEG(0)
+#define USER_DS         MAKE_MM_SEG(1)
+
+#define get_ds()        (KERNEL_DS)
+#define get_fs()        (current->thread.mm_segment)
+
+#ifdef __s390x__
+#define set_fs(x) \
+({                                                                      \
+        unsigned long __pto;                                            \
+        current->thread.mm_segment = (x);                               \
+        __pto = current->thread.mm_segment.ar4 ?                        \
+                S390_lowcore.user_asce : S390_lowcore.kernel_asce;      \
+        asm volatile ("lctlg 7,7,%0" : : "m" (__pto) );                 \
+})
+#else
+#define set_fs(x) \
+({                                                                      \
+        unsigned long __pto;                                            \
+        current->thread.mm_segment = (x);                               \
+        __pto = current->thread.mm_segment.ar4 ?                        \
+                S390_lowcore.user_asce : S390_lowcore.kernel_asce;      \
+        asm volatile ("lctl  7,7,%0" : : "m" (__pto) );                 \
+})
+#endif
+
+#define segment_eq(a,b) ((a).ar4 == (b).ar4)
+
+
+#define __access_ok(addr,size) (1)
+
+#define access_ok(type,addr,size) __access_ok(addr,size)
+
+/* this function will go away soon - use access_ok() instead */
+extern inline int __deprecated verify_area(int type, const void __user *addr,
+                                                unsigned long size)
+{
+        return access_ok(type, addr, size) ? 0 : -EFAULT;
+}
+
+/*
+ * The exception table consists of pairs of addresses: the first is the
+ * address of an instruction that is allowed to fault, and the second is
+ * the address at which the program should continue.  No registers are
+ * modified, so it is entirely up to the continuation code to figure out
+ * what to do.
+ *
+ * All the routines below use bits of fixup code that are out of line
+ * with the main instruction path.  This means when everything is well,
+ * we don't even have to jump over them.  Further, they do not intrude
+ * on our cache or tlb entries.
+ */
+
+struct exception_table_entry
+{
+        unsigned long insn, fixup;
+};
+
+#ifndef __s390x__
+#define __uaccess_fixup \
+        ".section .fixup,\"ax\"\n"      \
+        "2: lhi    %0,%4\n"             \
+        "   bras   1,3f\n"              \
+        "   .long  1b\n"                \
+        "3: l      1,0(1)\n"            \
+        "   br     1\n"                 \
+        ".previous\n"                   \
+        ".section __ex_table,\"a\"\n"   \
+        "   .align 4\n"                 \
+        "   .long  0b,2b\n"             \
+        ".previous"
+#define __uaccess_clobber "cc", "1"
+#else /* __s390x__ */
+#define __uaccess_fixup \
+        ".section .fixup,\"ax\"\n"      \
+        "2: lghi   %0,%4\n"             \
+        "   jg     1b\n"                \
+        ".previous\n"                   \
+        ".section __ex_table,\"a\"\n"   \
+        "   .align 8\n"                 \
+        "   .quad  0b,2b\n"             \
+        ".previous"
+#define __uaccess_clobber "cc"
+#endif /* __s390x__ */
+
+/*
+ * These are the main single-value transfer routines.  They automatically
+ * use the right size if we just have the right pointer type.
+ */
+#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
+#define __put_user_asm(x, ptr, err) \
+({                                                              \
+        err = 0;                                                \
+        asm volatile(                                           \
+                "0: mvcs  0(%1,%2),%3,%0\n"                     \
+                "1:\n"                                          \
+                __uaccess_fixup                                 \
+                : "+&d" (err)                                   \
+                : "d" (sizeof(*(ptr))), "a" (ptr), "Q" (x),     \
+                  "K" (-EFAULT)                                 \
+                : __uaccess_clobber );                          \
+})
+#else
+#define __put_user_asm(x, ptr, err) \
+({                                                              \
+        err = 0;                                                \
+        asm volatile(                                           \
+                "0: mvcs  0(%1,%2),0(%3),%0\n"                  \
+                "1:\n"                                          \
+                __uaccess_fixup                                 \
+                : "+&d" (err)                                   \
+                : "d" (sizeof(*(ptr))), "a" (ptr), "a" (&(x)),  \
+                  "K" (-EFAULT), "m" (x)                        \
+                : __uaccess_clobber );                          \
+})
+#endif
+
+#ifndef __CHECKER__
+#define __put_user(x, ptr) \
+({                                                              \
+        __typeof__(*(ptr)) __x = (x);                           \
+        int __pu_err;                                           \
+        switch (sizeof (*(ptr))) {                              \
+        case 1:                                                 \
+        case 2:                                                 \
+        case 4:                                                 \
+        case 8:                                                 \
+                __put_user_asm(__x, ptr, __pu_err);             \
+                break;                                          \
+        default:                                                \
+                __put_user_bad();                               \
+                break;                                          \
+         }                                                      \
+        __pu_err;                                               \
+})
+#else
+#define __put_user(x, ptr)                      \
+({                                              \
+        void __user *p;                         \
+        p = (ptr);                              \
+        0;                                      \
+})
+#endif
+
+#define put_user(x, ptr)                                        \
+({                                                              \
+        might_sleep();                                          \
+        __put_user(x, ptr);                                     \
+})
+
+
+extern int __put_user_bad(void) __attribute__((noreturn));
+
+#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
+#define __get_user_asm(x, ptr, err) \
+({                                                              \
+        err = 0;                                                \
+        asm volatile (                                          \
+                "0: mvcp  %O1(%2,%R1),0(%3),%0\n"               \
+                "1:\n"                                          \
+                __uaccess_fixup                                 \
+                : "+&d" (err), "=Q" (x)                         \
+                : "d" (sizeof(*(ptr))), "a" (ptr),              \
+                  "K" (-EFAULT)                                 \
+                : __uaccess_clobber );                          \
+})
+#else
+#define __get_user_asm(x, ptr, err) \
+({                                                              \
+        err = 0;                                                \
+        asm volatile (                                          \
+                "0: mvcp  0(%2,%5),0(%3),%0\n"                  \
+                "1:\n"                                          \
+                __uaccess_fixup                                 \
+                : "+&d" (err), "=m" (x)                         \
+                : "d" (sizeof(*(ptr))), "a" (ptr),              \
+                  "K" (-EFAULT), "a" (&(x))                     \
+                : __uaccess_clobber );                          \
+})
+#endif
+
+#ifndef __CHECKER__
+#define __get_user(x, ptr)                                      \
+({                                                              \
+        __typeof__(*(ptr)) __x;                                 \
+        int __gu_err;                                           \
+        switch (sizeof(*(ptr))) {                               \
+        case 1:                                                 \
+        case 2:                                                 \
+        case 4:                                                 \
+        case 8:                                                 \
+                __get_user_asm(__x, ptr, __gu_err);             \
+                break;                                          \
+        default:                                                \
+                __get_user_bad();                               \
+                break;                                          \
+        }                                                       \
+        (x) = __x;                                              \
+        __gu_err;                                               \
+})
+#else
+#define __get_user(x, ptr)                      \
+({                                              \
+        void __user *p;                         \
+        p = (ptr);                              \
+        0;                                      \
+})
+#endif
+
+
+#define get_user(x, ptr)                                        \
+({                                                              \
+        might_sleep();                                          \
+        __get_user(x, ptr);                                     \
+})
+
+extern int __get_user_bad(void) __attribute__((noreturn));
+
+#define __put_user_unaligned __put_user
+#define __get_user_unaligned __get_user
+
+extern long __copy_to_user_asm(const void *from, long n, void __user *to);
+
+/**
+ * __copy_to_user: - Copy a block of data into user space, with less checking.
+ * @to:   Destination address, in user space.
+ * @from: Source address, in kernel space.
+ * @n:    Number of bytes to copy.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * Copy data from kernel space to user space.  Caller must check
+ * the specified block with access_ok() before calling this function.
+ *
+ * Returns number of bytes that could not be copied.
+ * On success, this will be zero.
+ */
+static inline unsigned long
+__copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+        return __copy_to_user_asm(from, n, to);
+}
+
+#define __copy_to_user_inatomic __copy_to_user
+#define __copy_from_user_inatomic __copy_from_user
+
+/**
+ * copy_to_user: - Copy a block of data into user space.
+ * @to:   Destination address, in user space.
+ * @from: Source address, in kernel space.
+ * @n:    Number of bytes to copy.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * Copy data from kernel space to user space.
+ *
+ * Returns number of bytes that could not be copied.
+ * On success, this will be zero.
+ */
+static inline unsigned long
+copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+        might_sleep();
+        if (access_ok(VERIFY_WRITE, to, n))
+                n = __copy_to_user(to, from, n);
+        return n;
+}
+
+extern long __copy_from_user_asm(void *to, long n, const void __user *from);
+
+/**
+ * __copy_from_user: - Copy a block of data from user space, with less checking.
+ * @to:   Destination address, in kernel space.
+ * @from: Source address, in user space.
+ * @n:    Number of bytes to copy.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * Copy data from user space to kernel space.  Caller must check
+ * the specified block with access_ok() before calling this function.
+ *
+ * Returns number of bytes that could not be copied.
+ * On success, this will be zero.
+ *
+ * If some data could not be copied, this function will pad the copied
+ * data to the requested size using zero bytes.
+ */
+static inline unsigned long
+__copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+        return __copy_from_user_asm(to, n, from);
+}
+
+/**
+ * copy_from_user: - Copy a block of data from user space.
+ * @to:   Destination address, in kernel space.
+ * @from: Source address, in user space.
+ * @n:    Number of bytes to copy.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * Copy data from user space to kernel space.
+ *
+ * Returns number of bytes that could not be copied.
+ * On success, this will be zero.
+ *
+ * If some data could not be copied, this function will pad the copied
+ * data to the requested size using zero bytes.
+ */
+static inline unsigned long
+copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+        might_sleep();
+        if (access_ok(VERIFY_READ, from, n))
+                n = __copy_from_user(to, from, n);
+        else
+                memset(to, 0, n);
+        return n;
+}
+
+extern unsigned long __copy_in_user_asm(const void __user *from, long n,
+                                                        void __user *to);
+
+static inline unsigned long
+__copy_in_user(void __user *to, const void __user *from, unsigned long n)
+{
+        return __copy_in_user_asm(from, n, to);
+}
+
+static inline unsigned long
+copy_in_user(void __user *to, const void __user *from, unsigned long n)
+{
+        might_sleep();
+        if (__access_ok(from,n) && __access_ok(to,n))
+                n = __copy_in_user_asm(from, n, to);
+        return n;
+}
+
+/*
+ * Copy a null terminated string from userspace.
+ */
+extern long __strncpy_from_user_asm(long count, char *dst,
+                                        const char __user *src);
+
+static inline long
+strncpy_from_user(char *dst, const char __user *src, long count)
+{
+        long res = -EFAULT;
+        might_sleep();
+        if (access_ok(VERIFY_READ, src, 1))
+                res = __strncpy_from_user_asm(count, dst, src);
+        return res;
+}
+
+
+extern long __strnlen_user_asm(long count, const char __user *src);
+
+static inline unsigned long
+strnlen_user(const char __user * src, unsigned long n)
+{
+        might_sleep();
+        return __strnlen_user_asm(n, src);
+}
+
+/**
+ * strlen_user: - Get the size of a string in user space.
+ * @str: The string to measure.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * Get the size of a NUL-terminated string in user space.
+ *
+ * Returns the size of the string INCLUDING the terminating NUL.
+ * On exception, returns 0.
+ *
+ * If there is a limit on the length of a valid string, you may wish to
+ * consider using strnlen_user() instead.
+ */
+#define strlen_user(str) strnlen_user(str, ~0UL)
+
+/*
+ * Zero Userspace
+ */
+
+extern long __clear_user_asm(void __user *to, long n);
+
+static inline unsigned long
+__clear_user(void __user *to, unsigned long n)
+{
+        return __clear_user_asm(to, n);
+}
+
+static inline unsigned long
+clear_user(void __user *to, unsigned long n)
+{
+        might_sleep();
+        if (access_ok(VERIFY_WRITE, to, n))
+                n = __clear_user_asm(to, n);
+        return n;
+}
+
+#endif /* __S390_UACCESS_H */