powerpc/mm: Rename arch/powerpc/kernel/mmap.c to mmap_64.c

This file is only useful on 64-bit, so we name it accordingly.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
index 6d2838fc8792cfc375c992b70f1f65549a3a1128..17290bcedc5e6b0850cc961d0e99d4ca615adf4e 100644 (file)
--- a/arch/powerpc/mm/Makefile
+++ b/arch/powerpc/mm/Makefile
@@ -14,7 +14,7 @@ obj-$(CONFIG_PPC_MMU_NOHASH)  += mmu_context_nohash.o tlb_nohash.o \
 hash-$(CONFIG_PPC_NATIVE)      := hash_native_64.o
 obj-$(CONFIG_PPC64)            += hash_utils_64.o \
                                   slb_low.o slb.o stab.o \
-                                  mmap.o $(hash-y)
+                                  mmap_64.o $(hash-y)
 obj-$(CONFIG_PPC_STD_MMU_32)   += ppc_mmu_32.o
 obj-$(CONFIG_PPC_STD_MMU)      += hash_low_$(CONFIG_WORD_SIZE).o \
                                   tlb_hash$(CONFIG_WORD_SIZE).o \

diff --git a/arch/powerpc/mm/mmap.c b/arch/powerpc/mm/mmap.c
deleted file mode 100644 (file)
index 0d957a4..0000000
--- a/arch/powerpc/mm/mmap.c
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- *  flexible mmap layout support
- *
- * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
- *
- * Started by Ingo Molnar <mingo@elte.hu>
- */
-
-#include <linux/personality.h>
-#include <linux/mm.h>
-#include <linux/random.h>
-#include <linux/sched.h>
-
-/*
- * Top of mmap area (just below the process stack).
- *
- * Leave at least a ~128 MB hole on 32bit applications.
- *
- * On 64bit applications we randomise the stack by 1GB so we need to
- * space our mmap start address by a further 1GB, otherwise there is a
- * chance the mmap area will end up closer to the stack than our ulimit
- * requires.
- */
-#define MIN_GAP32 (128*1024*1024)
-#define MIN_GAP64 ((128 + 1024)*1024*1024UL)
-#define MIN_GAP ((is_32bit_task()) ? MIN_GAP32 : MIN_GAP64)
-#define MAX_GAP (TASK_SIZE/6*5)
-
-static inline int mmap_is_legacy(void)
-{
-       if (current->personality & ADDR_COMPAT_LAYOUT)
-               return 1;
-
-       if (current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY)
-               return 1;
-
-       return sysctl_legacy_va_layout;
-}
-
-/*
- * Since get_random_int() returns the same value within a 1 jiffy window,
- * we will almost always get the same randomisation for the stack and mmap
- * region. This will mean the relative distance between stack and mmap will
- * be the same.
- *
- * To avoid this we can shift the randomness by 1 bit.
- */
-static unsigned long mmap_rnd(void)
-{
-       unsigned long rnd = 0;
-
-       if (current->flags & PF_RANDOMIZE) {
-               /* 8MB for 32bit, 1GB for 64bit */
-               if (is_32bit_task())
-                       rnd = (long)(get_random_int() % (1<<(22-PAGE_SHIFT)));
-               else
-                       rnd = (long)(get_random_int() % (1<<(29-PAGE_SHIFT)));
-       }
-       return (rnd << PAGE_SHIFT) * 2;
-}
-
-static inline unsigned long mmap_base(void)
-{
-       unsigned long gap = current->signal->rlim[RLIMIT_STACK].rlim_cur;
-
-       if (gap < MIN_GAP)
-               gap = MIN_GAP;
-       else if (gap > MAX_GAP)
-               gap = MAX_GAP;
-
-       return PAGE_ALIGN(TASK_SIZE - gap - mmap_rnd());
-}
-
-/*
- * This function, called very early during the creation of a new
- * process VM image, sets up which VM layout function to use:
- */
-void arch_pick_mmap_layout(struct mm_struct *mm)
-{
-       /*
-        * Fall back to the standard layout if the personality
-        * bit is set, or if the expected stack growth is unlimited:
-        */
-       if (mmap_is_legacy()) {
-               mm->mmap_base = TASK_UNMAPPED_BASE;
-               mm->get_unmapped_area = arch_get_unmapped_area;
-               mm->unmap_area = arch_unmap_area;
-       } else {
-               mm->mmap_base = mmap_base();
-               mm->get_unmapped_area = arch_get_unmapped_area_topdown;
-               mm->unmap_area = arch_unmap_area_topdown;
-       }
-}

diff --git a/arch/powerpc/mm/mmap_64.c b/arch/powerpc/mm/mmap_64.c
new file mode 100644 (file)
index 0000000..0d957a4
--- /dev/null
+++ b/arch/powerpc/mm/mmap_64.c
@@ -0,0 +1,109 @@
+/*
+ *  flexible mmap layout support
+ *
+ * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *
+ * Started by Ingo Molnar <mingo@elte.hu>
+ */
+
+#include <linux/personality.h>
+#include <linux/mm.h>
+#include <linux/random.h>
+#include <linux/sched.h>
+
+/*
+ * Top of mmap area (just below the process stack).
+ *
+ * Leave at least a ~128 MB hole on 32bit applications.
+ *
+ * On 64bit applications we randomise the stack by 1GB so we need to
+ * space our mmap start address by a further 1GB, otherwise there is a
+ * chance the mmap area will end up closer to the stack than our ulimit
+ * requires.
+ */
+#define MIN_GAP32 (128*1024*1024)
+#define MIN_GAP64 ((128 + 1024)*1024*1024UL)
+#define MIN_GAP ((is_32bit_task()) ? MIN_GAP32 : MIN_GAP64)
+#define MAX_GAP (TASK_SIZE/6*5)
+
+static inline int mmap_is_legacy(void)
+{
+       if (current->personality & ADDR_COMPAT_LAYOUT)
+               return 1;
+
+       if (current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY)
+               return 1;
+
+       return sysctl_legacy_va_layout;
+}
+
+/*
+ * Since get_random_int() returns the same value within a 1 jiffy window,
+ * we will almost always get the same randomisation for the stack and mmap
+ * region. This will mean the relative distance between stack and mmap will
+ * be the same.
+ *
+ * To avoid this we can shift the randomness by 1 bit.
+ */
+static unsigned long mmap_rnd(void)
+{
+       unsigned long rnd = 0;
+
+       if (current->flags & PF_RANDOMIZE) {
+               /* 8MB for 32bit, 1GB for 64bit */
+               if (is_32bit_task())
+                       rnd = (long)(get_random_int() % (1<<(22-PAGE_SHIFT)));
+               else
+                       rnd = (long)(get_random_int() % (1<<(29-PAGE_SHIFT)));
+       }
+       return (rnd << PAGE_SHIFT) * 2;
+}
+
+static inline unsigned long mmap_base(void)
+{
+       unsigned long gap = current->signal->rlim[RLIMIT_STACK].rlim_cur;
+
+       if (gap < MIN_GAP)
+               gap = MIN_GAP;
+       else if (gap > MAX_GAP)
+               gap = MAX_GAP;
+
+       return PAGE_ALIGN(TASK_SIZE - gap - mmap_rnd());
+}
+
+/*
+ * This function, called very early during the creation of a new
+ * process VM image, sets up which VM layout function to use:
+ */
+void arch_pick_mmap_layout(struct mm_struct *mm)
+{
+       /*
+        * Fall back to the standard layout if the personality
+        * bit is set, or if the expected stack growth is unlimited:
+        */
+       if (mmap_is_legacy()) {
+               mm->mmap_base = TASK_UNMAPPED_BASE;
+               mm->get_unmapped_area = arch_get_unmapped_area;
+               mm->unmap_area = arch_unmap_area;
+       } else {
+               mm->mmap_base = mmap_base();
+               mm->get_unmapped_area = arch_get_unmapped_area_topdown;
+               mm->unmap_area = arch_unmap_area_topdown;
+       }
+}