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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-03 17:29:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-03 17:29:01 -0700 |
| commit | 8e4ef6386703835f91898334b72e48649646ec00 (patch) | |
| tree | d425944eaf774d48b676f32e523ecfddd4a49636 /mm/mmap.c | |
| parent | 6aebe7f9e8697531a11b007d1e8126ba1b6e0a53 (diff) | |
| parent | 6e68b08728ce3365c713f8663c6b05a79e2bbca1 (diff) | |
| download | lwn-8e4ef6386703835f91898334b72e48649646ec00.tar.gz lwn-8e4ef6386703835f91898334b72e48649646ec00.zip | |
Merge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 vdso updates from Ingo Molnar:
"The main changes in this cycle centered around adding support for
32-bit compatible C/R of the vDSO on 64-bit kernels, by Dmitry
Safonov"
* 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/vdso: Use CONFIG_X86_X32_ABI to enable vdso prctl
x86/vdso: Only define map_vdso_randomized() if CONFIG_X86_64
x86/vdso: Only define prctl_map_vdso() if CONFIG_CHECKPOINT_RESTORE
x86/signal: Add SA_{X32,IA32}_ABI sa_flags
x86/ptrace: Down with test_thread_flag(TIF_IA32)
x86/coredump: Use pr_reg size, rather that TIF_IA32 flag
x86/arch_prctl/vdso: Add ARCH_MAP_VDSO_*
x86/vdso: Replace calculate_addr in map_vdso() with addr
x86/vdso: Unmap vdso blob on vvar mapping failure
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 69cad562cd00..7a0707a48047 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -3068,6 +3068,14 @@ 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. |