5 files changed, 260 insertions, 194 deletions

diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index d4079cab2d58..2795618e4f07 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -21,6 +21,29 @@ config PAGE_OFFSET
         default "0x20000000" if MMU && SUPERH64
         default "0x00000000"
 
+config FORCE_MAX_ZONEORDER
+        int "Maximum zone order"
+        range 9 64 if PAGE_SIZE_16KB
+        default "9" if PAGE_SIZE_16KB
+        range 7 64 if PAGE_SIZE_64KB
+        default "7" if PAGE_SIZE_64KB
+        range 11 64
+        default "14" if !MMU
+        default "11"
+        help
+          The kernel memory allocator divides physically contiguous memory
+          blocks into "zones", where each zone is a power of two number of
+          pages.  This option selects the largest power of two that the kernel
+          keeps in the memory allocator.  If you need to allocate very large
+          blocks of physically contiguous memory, then you may need to
+          increase this value.
+
+          This config option is actually maximum order plus one. For example,
+          a value of 11 means that the largest free memory block is 2^10 pages.
+
+          The page size is not necessarily 4KB. Keep this in mind when
+          choosing a value for this option.
+
 config MEMORY_START
         hex "Physical memory start address"
         default "0x08000000"
@@ -201,14 +224,6 @@ config PAGE_SIZE_64KB
 
 endchoice
 
-config ENTRY_OFFSET
-        hex
-        default "0x00001000" if PAGE_SIZE_4KB
-        default "0x00002000" if PAGE_SIZE_8KB
-        default "0x00004000" if PAGE_SIZE_16KB
-        default "0x00010000" if PAGE_SIZE_64KB
-        default "0x00000000"
-
 choice
         prompt "HugeTLB page size"
         depends on HUGETLB_PAGE && (CPU_SH4 || CPU_SH5) && MMU
diff --git a/arch/sh/mm/cache-sh5.c b/arch/sh/mm/cache-sh5.c
index 9e277ec7d536..86762092508c 100644
--- a/arch/sh/mm/cache-sh5.c
+++ b/arch/sh/mm/cache-sh5.c
@@ -60,7 +60,7 @@ static inline void sh64_teardown_dtlb_cache_slot(void)
 static inline void sh64_icache_inv_all(void)
 {
         unsigned long long addr, flag, data;
-        unsigned int flags;
+        unsigned long flags;
 
         addr = ICCR0;
         flag = ICCR0_ICI;
@@ -172,7 +172,7 @@ static void sh64_icache_inv_user_page_range(struct mm_struct *mm,
                 unsigned long eaddr;
                 unsigned long after_last_page_start;
                 unsigned long mm_asid, current_asid;
-                unsigned long long flags = 0ULL;
+                unsigned long flags = 0;
 
                 mm_asid = cpu_asid(smp_processor_id(), mm);
                 current_asid = get_asid();
@@ -236,7 +236,7 @@ static void sh64_icache_inv_user_small_range(struct mm_struct *mm,
         unsigned long long eaddr = start;
         unsigned long long eaddr_end = start + len;
         unsigned long current_asid, mm_asid;
-        unsigned long long flags;
+        unsigned long flags;
         unsigned long long epage_start;
 
         /*
@@ -342,7 +342,7 @@ static void inline sh64_dcache_purge_sets(int sets_to_purge_base, int n_sets)
                          * alloco is a NOP if the cache is write-through.
                          */
                         if (test_bit(SH_CACHE_MODE_WT, &(cpu_data->dcache.flags)))
-                                ctrl_inb(eaddr);
+                                __raw_readb((unsigned long)eaddr);
                 }
         }
 
diff --git a/arch/sh/mm/ioremap_32.c b/arch/sh/mm/ioremap_32.c
index 60cc486d2c2c..da2f4186f2cd 100644
--- a/arch/sh/mm/ioremap_32.c
+++ b/arch/sh/mm/ioremap_32.c
@@ -46,17 +46,15 @@ void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
                 return NULL;
 
         /*
-         * If we're on an SH7751 or SH7780 PCI controller, PCI memory is
-         * mapped at the end of the address space (typically 0xfd000000)
-         * in a non-translatable area, so mapping through page tables for
-         * this area is not only pointless, but also fundamentally
-         * broken. Just return the physical address instead.
+         * If we're in the fixed PCI memory range, mapping through page
+         * tables is not only pointless, but also fundamentally broken.
+         * Just return the physical address instead.
          *
          * For boards that map a small PCI memory aperture somewhere in
          * P1/P2 space, ioremap() will already do the right thing,
          * and we'll never get this far.
          */
-        if (is_pci_memaddr(phys_addr) && is_pci_memaddr(last_addr))
+        if (is_pci_memory_fixed_range(phys_addr, size))
                 return (void __iomem *)phys_addr;
 
 #if !defined(CONFIG_PMB_FIXED)
@@ -121,7 +119,9 @@ void __iounmap(void __iomem *addr)
         unsigned long seg = PXSEG(vaddr);
         struct vm_struct *p;
 
-        if (seg < P3SEG || vaddr >= P3_ADDR_MAX || is_pci_memaddr(vaddr))
+        if (seg < P3SEG || vaddr >= P3_ADDR_MAX)
+                return;
+        if (is_pci_memory_fixed_range(vaddr, 0))
                 return;
 
 #ifdef CONFIG_PMB
diff --git a/arch/sh/mm/ioremap_64.c b/arch/sh/mm/ioremap_64.c
index 31e1bb5effbe..2331229f8126 100644
--- a/arch/sh/mm/ioremap_64.c
+++ b/arch/sh/mm/ioremap_64.c
@@ -27,88 +27,17 @@
 #include <asm/tlbflush.h>
 #include <asm/mmu.h>
 
-static void shmedia_mapioaddr(unsigned long, unsigned long);
-static unsigned long shmedia_ioremap(struct resource *, u32, int);
-
-/*
- * Generic mapping function (not visible outside):
- */
-
-/*
- * Remap an arbitrary physical address space into the kernel virtual
- * address space. Needed when the kernel wants to access high addresses
- * directly.
- *
- * NOTE! We need to allow non-page-aligned mappings too: we will obviously
- * have to convert them into an offset in a page-aligned mapping, but the
- * caller shouldn't need to know that small detail.
- */
-void *__ioremap(unsigned long phys_addr, unsigned long size,
-                unsigned long flags)
-{
-        void * addr;
-        struct vm_struct * area;
-        unsigned long offset, last_addr;
-        pgprot_t pgprot;
-
-        /* Don't allow wraparound or zero size */
-        last_addr = phys_addr + size - 1;
-        if (!size || last_addr < phys_addr)
-                return NULL;
-
-        pgprot = __pgprot(_PAGE_PRESENT  | _PAGE_READ   |
-                          _PAGE_WRITE    | _PAGE_DIRTY  |
-                          _PAGE_ACCESSED | _PAGE_SHARED | flags);
-
-        /*
-         * Mappings have to be page-aligned
-         */
-        offset = phys_addr & ~PAGE_MASK;
-        phys_addr &= PAGE_MASK;
-        size = PAGE_ALIGN(last_addr + 1) - phys_addr;
-
-        /*
-         * Ok, go for it..
-         */
-        area = get_vm_area(size, VM_IOREMAP);
-        if (!area)
-                return NULL;
-        pr_debug("Get vm_area returns %p addr %p\n", area, area->addr);
-        area->phys_addr = phys_addr;
-        addr = area->addr;
-        if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size,
-                               phys_addr, pgprot)) {
-                vunmap(addr);
-                return NULL;
-        }
-        return (void *) (offset + (char *)addr);
-}
-EXPORT_SYMBOL(__ioremap);
-
-void __iounmap(void *addr)
-{
-        struct vm_struct *area;
-
-        vfree((void *) (PAGE_MASK & (unsigned long) addr));
-        area = remove_vm_area((void *) (PAGE_MASK & (unsigned long) addr));
-        if (!area) {
-                printk(KERN_ERR "iounmap: bad address %p\n", addr);
-                return;
-        }
-
-        kfree(area);
-}
-EXPORT_SYMBOL(__iounmap);
-
 static struct resource shmedia_iomap = {
         .name   = "shmedia_iomap",
         .start  = IOBASE_VADDR + PAGE_SIZE,
         .end    = IOBASE_END - 1,
 };
 
-static void shmedia_mapioaddr(unsigned long pa, unsigned long va);
+static void shmedia_mapioaddr(unsigned long pa, unsigned long va,
+                              unsigned long flags);
 static void shmedia_unmapioaddr(unsigned long vaddr);
-static unsigned long shmedia_ioremap(struct resource *res, u32 pa, int sz);
+static void __iomem *shmedia_ioremap(struct resource *res, u32 pa,
+                                     int sz, unsigned long flags);
 
 /*
  * We have the same problem as the SPARC, so lets have the same comment:
@@ -130,18 +59,18 @@ static struct xresource xresv[XNRES];
 
 static struct xresource *xres_alloc(void)
 {
-        struct xresource *xrp;
-        int n;
-
-        xrp = xresv;
-        for (n = 0; n < XNRES; n++) {
-                if (xrp->xflag == 0) {
-                        xrp->xflag = 1;
-                        return xrp;
-                }
-                xrp++;
-        }
-        return NULL;
+        struct xresource *xrp;
+        int n;
+
+        xrp = xresv;
+        for (n = 0; n < XNRES; n++) {
+                if (xrp->xflag == 0) {
+                        xrp->xflag = 1;
+                        return xrp;
+                }
+                xrp++;
+        }
+        return NULL;
 }
 
 static void xres_free(struct xresource *xrp)
@@ -161,76 +90,71 @@ static struct resource *shmedia_find_resource(struct resource *root,
         return NULL;
 }
 
-static unsigned long shmedia_alloc_io(unsigned long phys, unsigned long size,
-                                      const char *name)
+static void __iomem *shmedia_alloc_io(unsigned long phys, unsigned long size,
+                                      const char *name, unsigned long flags)
 {
-        static int printed_full = 0;
-        struct xresource *xres;
-        struct resource *res;
-        char *tack;
-        int tlen;
-
-        if (name == NULL) name = "???";
-
-        if ((xres = xres_alloc()) != 0) {
-                tack = xres->xname;
-                res = &xres->xres;
-        } else {
-                if (!printed_full) {
-                        printk("%s: done with statics, switching to kmalloc\n",
-                               __func__);
-                        printed_full = 1;
-                }
-                tlen = strlen(name);
-                tack = kmalloc(sizeof (struct resource) + tlen + 1, GFP_KERNEL);
-                if (!tack)
-                        return -ENOMEM;
-                memset(tack, 0, sizeof(struct resource));
-                res = (struct resource *) tack;
-                tack += sizeof (struct resource);
-        }
-
-        strncpy(tack, name, XNMLN);
-        tack[XNMLN] = 0;
-        res->name = tack;
-
-        return shmedia_ioremap(res, phys, size);
+        static int printed_full;
+        struct xresource *xres;
+        struct resource *res;
+        char *tack;
+        int tlen;
+
+        if (name == NULL)
+                name = "???";
+
+        xres = xres_alloc();
+        if (xres != 0) {
+                tack = xres->xname;
+                res = &xres->xres;
+        } else {
+                if (!printed_full) {
+                        printk(KERN_NOTICE "%s: done with statics, "
+                               "switching to kmalloc\n", __func__);
+                        printed_full = 1;
+                }
+                tlen = strlen(name);
+                tack = kmalloc(sizeof(struct resource) + tlen + 1, GFP_KERNEL);
+                if (!tack)
+                        return NULL;
+                memset(tack, 0, sizeof(struct resource));
+                res = (struct resource *) tack;
+                tack += sizeof(struct resource);
+        }
+
+        strncpy(tack, name, XNMLN);
+        tack[XNMLN] = 0;
+        res->name = tack;
+
+        return shmedia_ioremap(res, phys, size, flags);
 }
 
-static unsigned long shmedia_ioremap(struct resource *res, u32 pa, int sz)
+static void __iomem *shmedia_ioremap(struct resource *res, u32 pa, int sz,
+                                     unsigned long flags)
 {
-        unsigned long offset = ((unsigned long) pa) & (~PAGE_MASK);
+        unsigned long offset = ((unsigned long) pa) & (~PAGE_MASK);
         unsigned long round_sz = (offset + sz + PAGE_SIZE-1) & PAGE_MASK;
-        unsigned long va;
-        unsigned int psz;
+        unsigned long va;
+        unsigned int psz;
 
-        if (allocate_resource(&shmedia_iomap, res, round_sz,
+        if (allocate_resource(&shmedia_iomap, res, round_sz,
                               shmedia_iomap.start, shmedia_iomap.end,
                               PAGE_SIZE, NULL, NULL) != 0) {
-                panic("alloc_io_res(%s): cannot occupy\n",
-                    (res->name != NULL)? res->name: "???");
-        }
+                panic("alloc_io_res(%s): cannot occupy\n",
+                      (res->name != NULL) ? res->name : "???");
+        }
 
-        va = res->start;
-        pa &= PAGE_MASK;
+        va = res->start;
+        pa &= PAGE_MASK;
 
         psz = (res->end - res->start + (PAGE_SIZE - 1)) / PAGE_SIZE;
 
-        /* log at boot time ... */
-        printk("mapioaddr: %6s  [%2d page%s]  va 0x%08lx   pa 0x%08x\n",
-               ((res->name != NULL) ? res->name : "???"),
-               psz, psz == 1 ? " " : "s", va, pa);
-
-        for (psz = res->end - res->start + 1; psz != 0; psz -= PAGE_SIZE) {
-                shmedia_mapioaddr(pa, va);
-                va += PAGE_SIZE;
-                pa += PAGE_SIZE;
-        }
-
-        res->start += offset;
-        res->end = res->start + sz - 1;         /* not strictly necessary.. */
+        for (psz = res->end - res->start + 1; psz != 0; psz -= PAGE_SIZE) {
+                shmedia_mapioaddr(pa, va, flags);
+                va += PAGE_SIZE;
+                pa += PAGE_SIZE;
+        }
 
-        return res->start;
+        return (void __iomem *)(unsigned long)(res->start + offset);
 }
 
 static void shmedia_free_io(struct resource *res)
@@ -249,14 +173,12 @@ static void shmedia_free_io(struct resource *res)
 
 static __init_refok void *sh64_get_page(void)
 {
-        extern int after_bootmem;
         void *page;
 
-        if (after_bootmem) {
-                page = (void *)get_zeroed_page(GFP_ATOMIC);
-        } else {
+        if (after_bootmem)
+                page = (void *)get_zeroed_page(GFP_KERNEL);
+        else
                 page = alloc_bootmem_pages(PAGE_SIZE);
-        }
 
         if (!page || ((unsigned long)page & ~PAGE_MASK))
                 panic("sh64_get_page: Out of memory already?\n");
@@ -264,17 +186,20 @@ static __init_refok void *sh64_get_page(void)
         return page;
 }
 
-static void shmedia_mapioaddr(unsigned long pa, unsigned long va)
+static void shmedia_mapioaddr(unsigned long pa, unsigned long va,
+                              unsigned long flags)
 {
         pgd_t *pgdp;
         pud_t *pudp;
         pmd_t *pmdp;
         pte_t *ptep, pte;
         pgprot_t prot;
-        unsigned long flags = 1; /* 1 = CB0-1 device */
 
         pr_debug("shmedia_mapiopage pa %08lx va %08lx\n",  pa, va);
 
+        if (!flags)
+                flags = 1; /* 1 = CB0-1 device */
+
         pgdp = pgd_offset_k(va);
         if (pgd_none(*pgdp) || !pgd_present(*pgdp)) {
                 pudp = (pud_t *)sh64_get_page();
@@ -288,7 +213,7 @@ static void shmedia_mapioaddr(unsigned long pa, unsigned long va)
         }
 
         pmdp = pmd_offset(pudp, va);
-        if (pmd_none(*pmdp) || !pmd_present(*pmdp) ) {
+        if (pmd_none(*pmdp) || !pmd_present(*pmdp)) {
                 ptep = (pte_t *)sh64_get_page();
                 set_pmd(pmdp, __pmd((unsigned long)ptep + _PAGE_TABLE));
         }
@@ -336,17 +261,19 @@ static void shmedia_unmapioaddr(unsigned long vaddr)
         pte_clear(&init_mm, vaddr, ptep);
 }
 
-unsigned long onchip_remap(unsigned long phys, unsigned long size, const char *name)
+void __iomem *__ioremap(unsigned long offset, unsigned long size,
+                        unsigned long flags)
 {
-        if (size < PAGE_SIZE)
-                size = PAGE_SIZE;
+        char name[14];
 
-        return shmedia_alloc_io(phys, size, name);
+        sprintf(name, "phys_%08x", (u32)offset);
+        return shmedia_alloc_io(offset, size, name, flags);
 }
-EXPORT_SYMBOL(onchip_remap);
+EXPORT_SYMBOL(__ioremap);
 
-void onchip_unmap(unsigned long vaddr)
+void __iounmap(void __iomem *virtual)
 {
+        unsigned long vaddr = (unsigned long)virtual & PAGE_MASK;
         struct resource *res;
         unsigned int psz;
 
@@ -357,10 +284,7 @@ void onchip_unmap(unsigned long vaddr)
                 return;
         }
 
-        psz = (res->end - res->start + (PAGE_SIZE - 1)) / PAGE_SIZE;
-
-        printk(KERN_DEBUG "unmapioaddr: %6s  [%2d page%s] freed\n",
-               res->name, psz, psz == 1 ? " " : "s");
+        psz = (res->end - res->start + (PAGE_SIZE - 1)) / PAGE_SIZE;
 
         shmedia_free_io(res);
 
@@ -371,9 +295,8 @@ void onchip_unmap(unsigned long vaddr)
                 kfree(res);
         }
 }
-EXPORT_SYMBOL(onchip_unmap);
+EXPORT_SYMBOL(__iounmap);
 
-#ifdef CONFIG_PROC_FS
 static int
 ioremap_proc_info(char *buf, char **start, off_t fpos, int length, int *eof,
                   void *data)
@@ -385,7 +308,10 @@ ioremap_proc_info(char *buf, char **start, off_t fpos, int length, int *eof,
         for (r = ((struct resource *)data)->child; r != NULL; r = r->sibling) {
                 if (p + 32 >= e)        /* Better than nothing */
                         break;
-                if ((nm = r->name) == 0) nm = "???";
+                nm = r->name;
+                if (nm == NULL)
+                        nm = "???";
+
                 p += sprintf(p, "%08lx-%08lx: %s\n",
                              (unsigned long)r->start,
                              (unsigned long)r->end, nm);
@@ -393,14 +319,11 @@ ioremap_proc_info(char *buf, char **start, off_t fpos, int length, int *eof,
 
         return p-buf;
 }
-#endif /* CONFIG_PROC_FS */
 
 static int __init register_proc_onchip(void)
 {
-#ifdef CONFIG_PROC_FS
-        create_proc_read_entry("io_map",0,0, ioremap_proc_info, &shmedia_iomap);
-#endif
+        create_proc_read_entry("io_map", 0, 0, ioremap_proc_info,
+                               &shmedia_iomap);
         return 0;
 }
-
-__initcall(register_proc_onchip);
+late_initcall(register_proc_onchip);
diff --git a/arch/sh/mm/mmap.c b/arch/sh/mm/mmap.c
index 931f4d003fa0..1b5fdfb4e0c2 100644
--- a/arch/sh/mm/mmap.c
+++ b/arch/sh/mm/mmap.c
@@ -1,7 +1,7 @@
 /*
  * arch/sh/mm/mmap.c
  *
- * Copyright (C) 2008  Paul Mundt
+ * Copyright (C) 2008 - 2009  Paul Mundt
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -21,9 +21,26 @@ EXPORT_SYMBOL(shm_align_mask);
 /*
  * To avoid cache aliases, we map the shared page with same color.
  */
-#define COLOUR_ALIGN(addr, pgoff)                               \
-        ((((addr) + shm_align_mask) & ~shm_align_mask) +        \
-         (((pgoff) << PAGE_SHIFT) & shm_align_mask))
+static inline unsigned long COLOUR_ALIGN(unsigned long addr,
+                                         unsigned long pgoff)
+{
+        unsigned long base = (addr + shm_align_mask) & ~shm_align_mask;
+        unsigned long off = (pgoff << PAGE_SHIFT) & shm_align_mask;
+
+        return base + off;
+}
+
+static inline unsigned long COLOUR_ALIGN_DOWN(unsigned long addr,
+                                              unsigned long pgoff)
+{
+        unsigned long base = addr & ~shm_align_mask;
+        unsigned long off = (pgoff << PAGE_SHIFT) & shm_align_mask;
+
+        if (base + off <= addr)
+                return base + off;
+
+        return base - off;
+}
 
 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
         unsigned long len, unsigned long pgoff, unsigned long flags)
@@ -103,6 +120,117 @@ full_search:
                         addr = COLOUR_ALIGN(addr, pgoff);
         }
 }
+
+unsigned long
+arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
+                          const unsigned long len, const unsigned long pgoff,
+                          const unsigned long flags)
+{
+        struct vm_area_struct *vma;
+        struct mm_struct *mm = current->mm;
+        unsigned long addr = addr0;
+        int do_colour_align;
+
+        if (flags & MAP_FIXED) {
+                /* We do not accept a shared mapping if it would violate
+                 * cache aliasing constraints.
+                 */
+                if ((flags & MAP_SHARED) &&
+                    ((addr - (pgoff << PAGE_SHIFT)) & shm_align_mask))
+                        return -EINVAL;
+                return addr;
+        }
+
+        if (unlikely(len > TASK_SIZE))
+                return -ENOMEM;
+
+        do_colour_align = 0;
+        if (filp || (flags & MAP_SHARED))
+                do_colour_align = 1;
+
+        /* requesting a specific address */
+        if (addr) {
+                if (do_colour_align)
+                        addr = COLOUR_ALIGN(addr, pgoff);
+                else
+                        addr = PAGE_ALIGN(addr);
+
+                vma = find_vma(mm, addr);
+                if (TASK_SIZE - len >= addr &&
+                    (!vma || addr + len <= vma->vm_start))
+                        return addr;
+        }
+
+        /* check if free_area_cache is useful for us */
+        if (len <= mm->cached_hole_size) {
+                mm->cached_hole_size = 0;
+                mm->free_area_cache = mm->mmap_base;
+        }
+
+        /* either no address requested or can't fit in requested address hole */
+        addr = mm->free_area_cache;
+        if (do_colour_align) {
+                unsigned long base = COLOUR_ALIGN_DOWN(addr-len, pgoff);
+
+                addr = base + len;
+        }
+
+        /* make sure it can fit in the remaining address space */
+        if (likely(addr > len)) {
+                vma = find_vma(mm, addr-len);
+                if (!vma || addr <= vma->vm_start) {
+                        /* remember the address as a hint for next time */
+                        return (mm->free_area_cache = addr-len);
+                }
+        }
+
+        if (unlikely(mm->mmap_base < len))
+                goto bottomup;
+
+        addr = mm->mmap_base-len;
+        if (do_colour_align)
+                addr = COLOUR_ALIGN_DOWN(addr, pgoff);
+
+        do {
+                /*
+                 * Lookup failure means no vma is above this address,
+                 * else if new region fits below vma->vm_start,
+                 * return with success:
+                 */
+                vma = find_vma(mm, addr);
+                if (likely(!vma || addr+len <= vma->vm_start)) {
+                        /* remember the address as a hint for next time */
+                        return (mm->free_area_cache = addr);
+                }
+
+                /* remember the largest hole we saw so far */
+                if (addr + mm->cached_hole_size < vma->vm_start)
+                        mm->cached_hole_size = vma->vm_start - addr;
+
+                /* try just below the current vma->vm_start */
+                addr = vma->vm_start-len;
+                if (do_colour_align)
+                        addr = COLOUR_ALIGN_DOWN(addr, pgoff);
+        } while (likely(len < vma->vm_start));
+
+bottomup:
+        /*
+         * A failed mmap() very likely causes application failure,
+         * so fall back to the bottom-up function here. This scenario
+         * can happen with large stack limits and large mmap()
+         * allocations.
+         */
+        mm->cached_hole_size = ~0UL;
+        mm->free_area_cache = TASK_UNMAPPED_BASE;
+        addr = arch_get_unmapped_area(filp, addr0, len, pgoff, flags);
+        /*
+         * Restore the topdown base:
+         */
+        mm->free_area_cache = mm->mmap_base;
+        mm->cached_hole_size = ~0UL;
+
+        return addr;
+}
 #endif /* CONFIG_MMU */
 
 /*