Add a WARN() macro; this is WARN_ON() + printk arguments

[linux-2.6-omap-h63xx.git] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index 19908b26cf80494a0db8f3410384521081293a32..5a5d6fef341dd0d58cb6bde2d3b1602970ef6a0d 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -23,6 +23,7 @@
 #include <linux/sem.h>
 #include <linux/file.h>
 #include <linux/fdtable.h>
+#include <linux/iocontext.h>
 #include <linux/key.h>
 #include <linux/binfmts.h>
 #include <linux/mman.h>
@@ -32,6 +33,7 @@
 #include <linux/cpu.h>
 #include <linux/cgroup.h>
 #include <linux/security.h>
+#include <linux/hugetlb.h>
 #include <linux/swap.h>
 #include <linux/syscalls.h>
 #include <linux/jiffies.h>
@@ -91,6 +93,23 @@ int nr_processes(void)
 static struct kmem_cache *task_struct_cachep;
 #endif
 
+#ifndef __HAVE_ARCH_THREAD_INFO_ALLOCATOR
+static inline struct thread_info *alloc_thread_info(struct task_struct *tsk)
+{
+#ifdef CONFIG_DEBUG_STACK_USAGE
+       gfp_t mask = GFP_KERNEL | __GFP_ZERO;
+#else
+       gfp_t mask = GFP_KERNEL;
+#endif
+       return (struct thread_info *)__get_free_pages(mask, THREAD_SIZE_ORDER);
+}
+
+static inline void free_thread_info(struct thread_info *ti)
+{
+       free_pages((unsigned long)ti, THREAD_SIZE_ORDER);
+}
+#endif
+
 /* SLAB cache for signal_struct structures (tsk->signal) */
 static struct kmem_cache *signal_cachep;
 
@@ -305,6 +324,14 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
                        spin_unlock(&file->f_mapping->i_mmap_lock);
                }
 
+               /*
+                * Clear hugetlb-related page reserves for children. This only
+                * affects MAP_PRIVATE mappings. Faults generated by the child
+                * are not guaranteed to succeed, even if read-only
+                */
+               if (is_vm_hugetlb_page(tmp))
+                       reset_vma_resv_huge_pages(tmp);
+
                /*
                 * Link in the new vma and copy the page table entries.
                 */
@@ -909,7 +936,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 
        rt_mutex_init_task(p);
 
-#ifdef CONFIG_TRACE_IRQFLAGS
+#ifdef CONFIG_PROVE_LOCKING
        DEBUG_LOCKS_WARN_ON(!p->hardirqs_enabled);
        DEBUG_LOCKS_WARN_ON(!p->softirqs_enabled);
 #endif
@@ -1124,8 +1151,8 @@ static struct task_struct *copy_process(unsigned long clone_flags,
         */
        p->group_leader = p;
        INIT_LIST_HEAD(&p->thread_group);
-       INIT_LIST_HEAD(&p->ptrace_children);
-       INIT_LIST_HEAD(&p->ptrace_list);
+       INIT_LIST_HEAD(&p->ptrace_entry);
+       INIT_LIST_HEAD(&p->ptraced);
 
        /* Now that the task is set up, run cgroup callbacks if
         * necessary. We need to run them before the task is visible
@@ -1197,7 +1224,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        }
 
        if (likely(p->pid)) {
-               add_parent(p);
+               list_add_tail(&p->sibling, &p->real_parent->children);
                if (unlikely(p->ptrace & PT_PTRACED))
                        __ptrace_link(p, current->parent);