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>
  ...

1 files changed, 25 insertions, 27 deletions

diff --git a/fs/file.c b/fs/file.c
index 3c426de7203a..ba3f6053025c 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -40,7 +40,7 @@ int sysctl_nr_open_max = 1024 * 1024; /* raised later */
  */
 static DEFINE_PER_CPU(struct fdtable_defer, fdtable_defer_list);
 
-static void *alloc_fdmem(unsigned int size)
+static void *alloc_fdmem(size_t size)
 {
         /*
          * Very large allocations can stress page reclaim, so fall back to
@@ -142,7 +142,7 @@ static void copy_fdtable(struct fdtable *nfdt, struct fdtable *ofdt)
 static struct fdtable * alloc_fdtable(unsigned int nr)
 {
         struct fdtable *fdt;
-        char *data;
+        void *data;
 
         /*
          * Figure out how many fds we actually want to support in this fdtable.
@@ -172,14 +172,15 @@ static struct fdtable * alloc_fdtable(unsigned int nr)
         data = alloc_fdmem(nr * sizeof(struct file *));
         if (!data)
                 goto out_fdt;
-        fdt->fd = (struct file **)data;
-        data = alloc_fdmem(max_t(unsigned int,
+        fdt->fd = data;
+
+        data = alloc_fdmem(max_t(size_t,
                                  2 * nr / BITS_PER_BYTE, L1_CACHE_BYTES));
         if (!data)
                 goto out_arr;
-        fdt->open_fds = (fd_set *)data;
+        fdt->open_fds = data;
         data += nr / BITS_PER_BYTE;
-        fdt->close_on_exec = (fd_set *)data;
+        fdt->close_on_exec = data;
         fdt->next = NULL;
 
         return fdt;
@@ -275,11 +276,11 @@ static int count_open_files(struct fdtable *fdt)
         int i;
 
         /* Find the last open fd */
-        for (i = size/(8*sizeof(long)); i > 0; ) {
-                if (fdt->open_fds->fds_bits[--i])
+        for (i = size / BITS_PER_LONG; i > 0; ) {
+                if (fdt->open_fds[--i])
                         break;
         }
-        i = (i+1) * 8 * sizeof(long);
+        i = (i + 1) * BITS_PER_LONG;
         return i;
 }
 
@@ -306,8 +307,8 @@ struct files_struct *dup_fd(struct files_struct *oldf, int *errorp)
         newf->next_fd = 0;
         new_fdt = &newf->fdtab;
         new_fdt->max_fds = NR_OPEN_DEFAULT;
-        new_fdt->close_on_exec = (fd_set *)&newf->close_on_exec_init;
-        new_fdt->open_fds = (fd_set *)&newf->open_fds_init;
+        new_fdt->close_on_exec = newf->close_on_exec_init;
+        new_fdt->open_fds = newf->open_fds_init;
         new_fdt->fd = &newf->fd_array[0];
         new_fdt->next = NULL;
 
@@ -350,10 +351,8 @@ struct files_struct *dup_fd(struct files_struct *oldf, int *errorp)
         old_fds = old_fdt->fd;
         new_fds = new_fdt->fd;
 
-        memcpy(new_fdt->open_fds->fds_bits,
-                old_fdt->open_fds->fds_bits, open_files/8);
-        memcpy(new_fdt->close_on_exec->fds_bits,
-                old_fdt->close_on_exec->fds_bits, open_files/8);
+        memcpy(new_fdt->open_fds, old_fdt->open_fds, open_files / 8);
+        memcpy(new_fdt->close_on_exec, old_fdt->close_on_exec, open_files / 8);
 
         for (i = open_files; i != 0; i--) {
                 struct file *f = *old_fds++;
@@ -366,7 +365,7 @@ struct files_struct *dup_fd(struct files_struct *oldf, int *errorp)
                          * is partway through open().  So make sure that this
                          * fd is available to the new process.
                          */
-                        FD_CLR(open_files - i, new_fdt->open_fds);
+                        __clear_open_fd(open_files - i, new_fdt);
                 }
                 rcu_assign_pointer(*new_fds++, f);
         }
@@ -379,11 +378,11 @@ struct files_struct *dup_fd(struct files_struct *oldf, int *errorp)
         memset(new_fds, 0, size);
 
         if (new_fdt->max_fds > open_files) {
-                int left = (new_fdt->max_fds-open_files)/8;
-                int start = open_files / (8 * sizeof(unsigned long));
+                int left = (new_fdt->max_fds - open_files) / 8;
+                int start = open_files / BITS_PER_LONG;
 
-                memset(&new_fdt->open_fds->fds_bits[start], 0, left);
-                memset(&new_fdt->close_on_exec->fds_bits[start], 0, left);
+                memset(&new_fdt->open_fds[start], 0, left);
+                memset(&new_fdt->close_on_exec[start], 0, left);
         }
 
         rcu_assign_pointer(newf->fdt, new_fdt);
@@ -419,8 +418,8 @@ struct files_struct init_files = {
         .fdtab          = {
                 .max_fds        = NR_OPEN_DEFAULT,
                 .fd             = &init_files.fd_array[0],
-                .close_on_exec  = (fd_set *)&init_files.close_on_exec_init,
-                .open_fds       = (fd_set *)&init_files.open_fds_init,
+                .close_on_exec  = init_files.close_on_exec_init,
+                .open_fds       = init_files.open_fds_init,
         },
         .file_lock      = __SPIN_LOCK_UNLOCKED(init_task.file_lock),
 };
@@ -443,8 +442,7 @@ repeat:
                 fd = files->next_fd;
 
         if (fd < fdt->max_fds)
-                fd = find_next_zero_bit(fdt->open_fds->fds_bits,
-                                           fdt->max_fds, fd);
+                fd = find_next_zero_bit(fdt->open_fds, fdt->max_fds, fd);
 
         error = expand_files(files, fd);
         if (error < 0)
@@ -460,11 +458,11 @@ repeat:
         if (start <= files->next_fd)
                 files->next_fd = fd + 1;
 
-        FD_SET(fd, fdt->open_fds);
+        __set_open_fd(fd, fdt);
         if (flags & O_CLOEXEC)
-                FD_SET(fd, fdt->close_on_exec);
+                __set_close_on_exec(fd, fdt);
         else
-                FD_CLR(fd, fdt->close_on_exec);
+                __clear_close_on_exec(fd, fdt);
         error = fd;
 #if 1
         /* Sanity check */