Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[pandora-kernel.git] / fs / proc / task_mmu.c

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 0962739..47f5b14 100644 (file)
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -4,6 +4,7 @@
 #include <linux/seq_file.h>
 #include <linux/highmem.h>
 #include <linux/ptrace.h>
+#include <linux/slab.h>
 #include <linux/pagemap.h>
 #include <linux/mempolicy.h>
 #include <linux/swap.h>
@@ -246,25 +247,6 @@ static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
                                } else if (vma->vm_start <= mm->start_stack &&
                                           vma->vm_end >= mm->start_stack) {
                                        name = "[stack]";
-                               } else {
-                                       unsigned long stack_start;
-                                       struct proc_maps_private *pmp;
-
-                                       pmp = m->private;
-                                       stack_start = pmp->task->stack_start;
-
-                                       if (vma->vm_start <= stack_start &&
-                                           vma->vm_end >= stack_start) {
-                                               pad_len_spaces(m, len);
-                                               seq_printf(m,
-                                                "[threadstack:%08lx]",
-#ifdef CONFIG_STACK_GROWSUP
-                                                vma->vm_end - stack_start
-#else
-                                                stack_start - vma->vm_start
-#endif
-                                               );
-                                       }
                                }
                        } else {
                                name = "[vdso]";
@@ -661,31 +643,18 @@ static u64 huge_pte_to_pagemap_entry(pte_t pte, int offset)
        return pme;
 }
 
-static int pagemap_hugetlb_range(pte_t *pte, unsigned long addr,
-                                unsigned long end, struct mm_walk *walk)
+/* This function walks within one hugetlb entry in the single call */
+static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask,
+                                unsigned long addr, unsigned long end,
+                                struct mm_walk *walk)
 {
-       struct vm_area_struct *vma;
        struct pagemapread *pm = walk->private;
-       struct hstate *hs = NULL;
        int err = 0;
+       u64 pfn;
 
-       vma = find_vma(walk->mm, addr);
-       if (vma)
-               hs = hstate_vma(vma);
        for (; addr != end; addr += PAGE_SIZE) {
-               u64 pfn = PM_NOT_PRESENT;
-
-               if (vma && (addr >= vma->vm_end)) {
-                       vma = find_vma(walk->mm, addr);
-                       if (vma)
-                               hs = hstate_vma(vma);
-               }
-
-               if (vma && (vma->vm_start <= addr) && is_vm_hugetlb_page(vma)) {
-                       /* calculate pfn of the "raw" page in the hugepage. */
-                       int offset = (addr & ~huge_page_mask(hs)) >> PAGE_SHIFT;
-                       pfn = huge_pte_to_pagemap_entry(*pte, offset);
-               }
+               int offset = (addr & ~hmask) >> PAGE_SHIFT;
+               pfn = huge_pte_to_pagemap_entry(*pte, offset);
                err = add_to_pagemap(addr, pfn, pm);
                if (err)
                        return err;
@@ -799,7 +768,7 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
                start_vaddr = end;
 
                len = min(count, PM_ENTRY_BYTES * pm.pos);
-               if (copy_to_user(buf, pm.buffer, len) < 0) {
+               if (copy_to_user(buf, pm.buffer, len)) {
                        ret = -EFAULT;
                        goto out_free;
                }