[libc] [llvm] Implement pkey_alloc/free/get/set/mprotect for x86_64 linux (PR #162362)

[Michael Jones via llvm-commits]

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@@ -0,0 +1,71 @@
+#ifndef LLVM_SYS_MMAN_LINUX_X86_64_PKEY_COMMON_H_
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michaelrj-google wrote:

missing license header

https://github.com/llvm/llvm-project/pull/162362