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| author | Dmitry Safonov <dsafonov@virtuozzo.com> | 2016-09-05 15:33:05 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-09-14 21:28:09 +0200 |
| commit | 2eefd8789698e89c4a5d610921dc3c1b66e3bd0d (patch) | |
| tree | f9f1fe811f7f2c5395b4c5ba2bb9d6b54ea026cd /mm/mmap.c | |
| parent | x86/vdso: Replace calculate_addr in map_vdso() with addr (diff) | |
| download | linux-2eefd8789698e89c4a5d610921dc3c1b66e3bd0d.tar.xz linux-2eefd8789698e89c4a5d610921dc3c1b66e3bd0d.zip | |
x86/arch_prctl/vdso: Add ARCH_MAP_VDSO_*
Add API to change vdso blob type with arch_prctl.
As this is usefull only by needs of CRIU, expose
this interface under CONFIG_CHECKPOINT_RESTORE.
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: 0x7f454c46@gmail.com
Cc: oleg@redhat.com
Cc: linux-mm@kvack.org
Cc: gorcunov@openvz.org
Cc: xemul@virtuozzo.com
Link: http://lkml.kernel.org/r/20160905133308.28234-4-dsafonov@virtuozzo.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index ca9d91bca0d6..6373ebd358c0 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -3063,6 +3063,14 @@ out: return ERR_PTR(ret); } +bool vma_is_special_mapping(const struct vm_area_struct *vma, + const struct vm_special_mapping *sm) +{ + return vma->vm_private_data == sm && + (vma->vm_ops == &special_mapping_vmops || + vma->vm_ops == &legacy_special_mapping_vmops); +} + /* * Called with mm->mmap_sem held for writing. * Insert a new vma covering the given region, with the given flags. |