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| author |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-08-09 12:12:52 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-08-09 12:12:52 +0200 |
| commit | d0ed4c60abfb9a4ab6cd416d1dea9df6266f8fc7 (patch) | |
| tree | 8fd3af1a9e788333e85d2a51a4fc2a9858a9a95a /kernel/fork.c | |
| parent | ACPI / x86: enable touchscreen on Dell Venue Pro 7139 (diff) | |
| parent | ACPI / scan: Create platform device for fwnodes with multiple i2c devices (diff) | |
| download | wireguard-linux-d0ed4c60abfb9a4ab6cd416d1dea9df6266f8fc7.tar.xz wireguard-linux-d0ed4c60abfb9a4ab6cd416d1dea9df6266f8fc7.zip | |
Merge branch 'acpi-scan' to satisfy dependencies.
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 9440d61b925c..1b27babc4c78 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -303,11 +303,36 @@ struct kmem_cache *files_cachep; struct kmem_cache *fs_cachep; /* SLAB cache for vm_area_struct structures */ -struct kmem_cache *vm_area_cachep; +static struct kmem_cache *vm_area_cachep; /* SLAB cache for mm_struct structures (tsk->mm) */ static struct kmem_cache *mm_cachep; +struct vm_area_struct *vm_area_alloc(struct mm_struct *mm) +{ + struct vm_area_struct *vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL); + + if (vma) + vma_init(vma, mm); + return vma; +} + +struct vm_area_struct *vm_area_dup(struct vm_area_struct *orig) +{ + struct vm_area_struct *new = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL); + + if (new) { + *new = *orig; + INIT_LIST_HEAD(&new->anon_vma_chain); + } + return new; +} + +void vm_area_free(struct vm_area_struct *vma) +{ + kmem_cache_free(vm_area_cachep, vma); +} + static void account_kernel_stack(struct task_struct *tsk, int account) { void *stack = task_stack_page(tsk); @@ -455,11 +480,9 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm, goto fail_nomem; charge = len; } - tmp = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL); + tmp = vm_area_dup(mpnt); if (!tmp) goto fail_nomem; - *tmp = *mpnt; - INIT_LIST_HEAD(&tmp->anon_vma_chain); retval = vma_dup_policy(mpnt, tmp); if (retval) goto fail_nomem_policy; @@ -539,7 +562,7 @@ fail_uprobe_end: fail_nomem_anon_vma_fork: mpol_put(vma_policy(tmp)); fail_nomem_policy: - kmem_cache_free(vm_area_cachep, tmp); + vm_area_free(tmp); fail_nomem: retval = -ENOMEM; vm_unacct_memory(charge); |