Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b50731732f926d6c49fd0724616a7344c31cd5cf
Commit:     b50731732f926d6c49fd0724616a7344c31cd5cf
Parent:     df336d1c7b6fd510fa6d3a028f999e7586c7026e
Author:     Paul Mundt <[EMAIL PROTECTED]>
AuthorDate: Sat Jul 21 04:37:25 2007 -0700
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Sat Jul 21 17:49:14 2007 -0700

    nommu: vmalloc_32_user()/vm_insert_page() and symbol exports.
    
    Trying to survive an allmodconfig on a nommu platform results in many
    screen lengths of module unhappiness.  Many of the mmap related things that
    binfmt_flat hooks in to are never exported despite being global, and there
    are also missing definitions for vmalloc_32_user() and vm_insert_page().
    
    I've implemented vmalloc_32_user() trying to stick as close to the
    mm/vmalloc.c implementation as possible, though we don't have any need for
    VM_USERMAP, so groveling for the VMA can be skipped.  vm_insert_page() has
    been stubbed for now in order to keep the build happy.
    
    Signed-off-by: Paul Mundt <[EMAIL PROTECTED]>
    Cc: David Howells <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
 mm/nommu.c |   45 +++++++++++++++++++++++++++++++++------------
 1 files changed, 33 insertions(+), 12 deletions(-)

diff --git a/mm/nommu.c b/mm/nommu.c
index 1b105d2..9eef6a3 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -54,12 +54,6 @@ DECLARE_RWSEM(nommu_vma_sem);
 struct vm_operations_struct generic_file_vm_ops = {
 };
 
-EXPORT_SYMBOL(vfree);
-EXPORT_SYMBOL(vmalloc_to_page);
-EXPORT_SYMBOL(vmalloc_32);
-EXPORT_SYMBOL(vmap);
-EXPORT_SYMBOL(vunmap);
-
 /*
  * Handle all mappings that got truncated by a "truncate()"
  * system call.
@@ -168,7 +162,6 @@ int get_user_pages(struct task_struct *tsk, struct 
mm_struct *mm,
 finish_or_fault:
        return i ? : -EFAULT;
 }
-
 EXPORT_SYMBOL(get_user_pages);
 
 DEFINE_RWLOCK(vmlist_lock);
@@ -178,6 +171,7 @@ void vfree(void *addr)
 {
        kfree(addr);
 }
+EXPORT_SYMBOL(vfree);
 
 void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot)
 {
@@ -186,17 +180,19 @@ void *__vmalloc(unsigned long size, gfp_t gfp_mask, 
pgprot_t prot)
         */
        return kmalloc(size, (gfp_mask | __GFP_COMP) & ~__GFP_HIGHMEM);
 }
+EXPORT_SYMBOL(__vmalloc);
 
 struct page * vmalloc_to_page(void *addr)
 {
        return virt_to_page(addr);
 }
+EXPORT_SYMBOL(vmalloc_to_page);
 
 unsigned long vmalloc_to_pfn(void *addr)
 {
        return page_to_pfn(virt_to_page(addr));
 }
-
+EXPORT_SYMBOL(vmalloc_to_pfn);
 
 long vread(char *buf, char *addr, unsigned long count)
 {
@@ -237,9 +233,8 @@ void *vmalloc_node(unsigned long size, int node)
 }
 EXPORT_SYMBOL(vmalloc_node);
 
-/*
- *     vmalloc_32  -  allocate virtually continguos memory (32bit addressable)
- *
+/**
+ * vmalloc_32  -  allocate virtually contiguous memory (32bit addressable)
  *     @size:          allocation size
  *
  *     Allocate enough 32bit PA addressable pages to cover @size from the
@@ -249,17 +244,33 @@ void *vmalloc_32(unsigned long size)
 {
        return __vmalloc(size, GFP_KERNEL, PAGE_KERNEL);
 }
+EXPORT_SYMBOL(vmalloc_32);
+
+/**
+ * vmalloc_32_user - allocate zeroed virtually contiguous 32bit memory
+ *     @size:          allocation size
+ *
+ * The resulting memory area is 32bit addressable and zeroed so it can be
+ * mapped to userspace without leaking data.
+ */
+void *vmalloc_32_user(unsigned long size)
+{
+       return __vmalloc(size, GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL);
+}
+EXPORT_SYMBOL(vmalloc_32_user);
 
 void *vmap(struct page **pages, unsigned int count, unsigned long flags, 
pgprot_t prot)
 {
        BUG();
        return NULL;
 }
+EXPORT_SYMBOL(vmap);
 
 void vunmap(void *addr)
 {
        BUG();
 }
+EXPORT_SYMBOL(vunmap);
 
 /*
  * Implement a stub for vmalloc_sync_all() if the architecture chose not to
@@ -269,6 +280,13 @@ void  __attribute__((weak)) vmalloc_sync_all(void)
 {
 }
 
+int vm_insert_page(struct vm_area_struct *vma, unsigned long addr,
+                  struct page *page)
+{
+       return -EINVAL;
+}
+EXPORT_SYMBOL(vm_insert_page);
+
 /*
  *  sys_brk() for the most part doesn't need the global kernel
  *  lock, except when an application is doing something nasty
@@ -994,6 +1012,7 @@ unsigned long do_mmap_pgoff(struct file *file,
        show_free_areas();
        return -ENOMEM;
 }
+EXPORT_SYMBOL(do_mmap_pgoff);
 
 /*
  * handle mapping disposal for uClinux
@@ -1074,6 +1093,7 @@ int do_munmap(struct mm_struct *mm, unsigned long addr, 
size_t len)
 
        return 0;
 }
+EXPORT_SYMBOL(do_munmap);
 
 asmlinkage long sys_munmap(unsigned long addr, size_t len)
 {
@@ -1164,6 +1184,7 @@ unsigned long do_mremap(unsigned long addr,
 
        return vma->vm_start;
 }
+EXPORT_SYMBOL(do_mremap);
 
 asmlinkage unsigned long sys_mremap(unsigned long addr,
        unsigned long old_len, unsigned long new_len,
@@ -1231,7 +1252,6 @@ unsigned long get_unmapped_area(struct file *file, 
unsigned long addr,
 
        return get_area(file, addr, len, pgoff, flags);
 }
-
 EXPORT_SYMBOL(get_unmapped_area);
 
 /*
@@ -1346,6 +1366,7 @@ int filemap_fault(struct vm_area_struct *vma, struct 
vm_fault *vmf)
        BUG();
        return 0;
 }
+EXPORT_SYMBOL(filemap_fault);
 
 /*
  * Access another process' address space.
-
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