Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x32 support for x86-64 from Ingo Molnar:
 "This tree introduces the X32 binary format and execution mode for x86:
  32-bit data space binaries using 64-bit instructions and 64-bit kernel
  syscalls.

  This allows applications whose working set fits into a 32 bits address
  space to make use of 64-bit instructions while using a 32-bit address
  space with shorter pointers, more compressed data structures, etc."

Fix up trivial context conflicts in arch/x86/{Kconfig,vdso/vma.c}

* 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (71 commits)
  x32: Fix alignment fail in struct compat_siginfo
  x32: Fix stupid ia32/x32 inversion in the siginfo format
  x32: Add ptrace for x32
  x32: Switch to a 64-bit clock_t
  x32: Provide separate is_ia32_task() and is_x32_task() predicates
  x86, mtrr: Use explicit sizing and padding for the 64-bit ioctls
  x86/x32: Fix the binutils auto-detect
  x32: Warn and disable rather than error if binutils too old
  x32: Only clear TIF_X32 flag once
  x32: Make sure TS_COMPAT is cleared for x32 tasks
  fs: Remove missed ->fds_bits from cessation use of fd_set structs internally
  fs: Fix close_on_exec pointer in alloc_fdtable
  x32: Drop non-__vdso weak symbols from the x32 VDSO
  x32: Fix coding style violations in the x32 VDSO code
  x32: Add x32 VDSO support
  x32: Allow x32 to be configured
  x32: If configured, add x32 system calls to system call tables
  x32: Handle process creation
  x32: Signal-related system calls
  x86: Add #ifdef CONFIG_COMPAT to <asm/sys_ia32.h>
  ...

7 files changed, 83 insertions, 32 deletions

diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index a25555381097..a4b5da2b83f5 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -357,6 +357,7 @@ header-y += suspend_ioctls.h
 header-y += swab.h
 header-y += synclink.h
 header-y += sysctl.h
+header-y += sysinfo.h
 header-y += taskstats.h
 header-y += tcp.h
 header-y += telephony.h
diff --git a/include/linux/aio_abi.h b/include/linux/aio_abi.h
index 2c8731664180..86fa7a71336a 100644
--- a/include/linux/aio_abi.h
+++ b/include/linux/aio_abi.h
@@ -30,7 +30,7 @@
 #include <linux/types.h>
 #include <asm/byteorder.h>
 
-typedef unsigned long   aio_context_t;
+typedef __kernel_ulong_t aio_context_t;
 
 enum {
         IOCB_CMD_PREAD = 0,
diff --git a/include/linux/compat.h b/include/linux/compat.h
index 35c2dbf2448a..5d46217f84ad 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -19,6 +19,10 @@
 #include <asm/siginfo.h>
 #include <asm/signal.h>
 
+#ifndef COMPAT_USE_64BIT_TIME
+#define COMPAT_USE_64BIT_TIME 0
+#endif
+
 #define compat_jiffies_to_clock_t(x)    \
                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
 
@@ -83,10 +87,26 @@ typedef struct {
         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
 } compat_sigset_t;
 
+/*
+ * These functions operate strictly on struct compat_time*
+ */
 extern int get_compat_timespec(struct timespec *,
                                const struct compat_timespec __user *);
 extern int put_compat_timespec(const struct timespec *,
                                struct compat_timespec __user *);
+extern int get_compat_timeval(struct timeval *,
+                              const struct compat_timeval __user *);
+extern int put_compat_timeval(const struct timeval *,
+                              struct compat_timeval __user *);
+/*
+ * These functions operate on 32- or 64-bit specs depending on
+ * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments and the
+ * naming as compat_get/put_ rather than get/put_compat_.
+ */
+extern int compat_get_timespec(struct timespec *, const void __user *);
+extern int compat_put_timespec(const struct timespec *, void __user *);
+extern int compat_get_timeval(struct timeval *, const void __user *);
+extern int compat_put_timeval(const struct timeval *, void __user *);
 
 struct compat_iovec {
         compat_uptr_t   iov_base;
diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h
index 82163c4b32c9..158a41eed314 100644
--- a/include/linux/fdtable.h
+++ b/include/linux/fdtable.h
@@ -21,23 +21,45 @@
  */
 #define NR_OPEN_DEFAULT BITS_PER_LONG
 
-/*
- * The embedded_fd_set is a small fd_set,
- * suitable for most tasks (which open <= BITS_PER_LONG files)
- */
-struct embedded_fd_set {
-        unsigned long fds_bits[1];
-};
-
 struct fdtable {
         unsigned int max_fds;
         struct file __rcu **fd;      /* current fd array */
-        fd_set *close_on_exec;
-        fd_set *open_fds;
+        unsigned long *close_on_exec;
+        unsigned long *open_fds;
         struct rcu_head rcu;
         struct fdtable *next;
 };
 
+static inline void __set_close_on_exec(int fd, struct fdtable *fdt)
+{
+        __set_bit(fd, fdt->close_on_exec);
+}
+
+static inline void __clear_close_on_exec(int fd, struct fdtable *fdt)
+{
+        __clear_bit(fd, fdt->close_on_exec);
+}
+
+static inline bool close_on_exec(int fd, const struct fdtable *fdt)
+{
+        return test_bit(fd, fdt->close_on_exec);
+}
+
+static inline void __set_open_fd(int fd, struct fdtable *fdt)
+{
+        __set_bit(fd, fdt->open_fds);
+}
+
+static inline void __clear_open_fd(int fd, struct fdtable *fdt)
+{
+        __clear_bit(fd, fdt->open_fds);
+}
+
+static inline bool fd_is_open(int fd, const struct fdtable *fdt)
+{
+        return test_bit(fd, fdt->open_fds);
+}
+
 /*
  * Open file table structure
  */
@@ -53,8 +75,8 @@ struct files_struct {
    */
         spinlock_t file_lock ____cacheline_aligned_in_smp;
         int next_fd;
-        struct embedded_fd_set close_on_exec_init;
-        struct embedded_fd_set open_fds_init;
+        unsigned long close_on_exec_init[1];
+        unsigned long open_fds_init[1];
         struct file __rcu * fd_array[NR_OPEN_DEFAULT];
 };
 
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 5db52d0ff1d4..a5375e7f3fea 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -1,6 +1,8 @@
 #ifndef _LINUX_KERNEL_H
 #define _LINUX_KERNEL_H
 
+#include <linux/sysinfo.h>
+
 /*
  * 'kernel.h' contains some often-used function prototypes etc
  */
@@ -698,27 +700,8 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
 # define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD
 #endif
 
-struct sysinfo;
 extern int do_sysinfo(struct sysinfo *info);
 
 #endif /* __KERNEL__ */
 
-#define SI_LOAD_SHIFT   16
-struct sysinfo {
-        long uptime;                    /* Seconds since boot */
-        unsigned long loads[3];         /* 1, 5, and 15 minute load averages */
-        unsigned long totalram;         /* Total usable main memory size */
-        unsigned long freeram;          /* Available memory size */
-        unsigned long sharedram;        /* Amount of shared memory */
-        unsigned long bufferram;        /* Memory used by buffers */
-        unsigned long totalswap;        /* Total swap space size */
-        unsigned long freeswap;         /* swap space still available */
-        unsigned short procs;           /* Number of current processes */
-        unsigned short pad;             /* explicit padding for m68k */
-        unsigned long totalhigh;        /* Total high memory size */
-        unsigned long freehigh;         /* Available high memory size */
-        unsigned int mem_unit;          /* Memory unit size in bytes */
-        char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */
-};
-
 #endif
diff --git a/include/linux/sysinfo.h b/include/linux/sysinfo.h
new file mode 100644
index 000000000000..934335a22522
--- /dev/null
+++ b/include/linux/sysinfo.h
@@ -0,0 +1,24 @@
+#ifndef _LINUX_SYSINFO_H
+#define _LINUX_SYSINFO_H
+
+#include <linux/types.h>
+
+#define SI_LOAD_SHIFT   16
+struct sysinfo {
+        __kernel_long_t uptime;         /* Seconds since boot */
+        __kernel_ulong_t loads[3];      /* 1, 5, and 15 minute load averages */
+        __kernel_ulong_t totalram;      /* Total usable main memory size */
+        __kernel_ulong_t freeram;       /* Available memory size */
+        __kernel_ulong_t sharedram;     /* Amount of shared memory */
+        __kernel_ulong_t bufferram;     /* Memory used by buffers */
+        __kernel_ulong_t totalswap;     /* Total swap space size */
+        __kernel_ulong_t freeswap;      /* swap space still available */
+        __u16 procs;                    /* Number of current processes */
+        __u16 pad;                      /* Explicit padding for m68k */
+        __kernel_ulong_t totalhigh;     /* Total high memory size */
+        __kernel_ulong_t freehigh;      /* Available high memory size */
+        __u32 mem_unit;                 /* Memory unit size in bytes */
+        char _f[20-2*sizeof(__kernel_ulong_t)-sizeof(__u32)];   /* Padding: libc5 uses this.. */
+};
+
+#endif /* _LINUX_SYSINFO_H */
diff --git a/include/linux/time.h b/include/linux/time.h
index 97734e9409c6..33a92ead4d88 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -255,6 +255,7 @@ static __always_inline void timespec_add_ns(struct timespec *a, u64 ns)
         a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns);
         a->tv_nsec = ns;
 }
+
 #endif /* __KERNEL__ */
 
 #define NFDBITS                 __NFDBITS