[PATCH 2/2] kselftest/arm64: Add test for atomic futex uaccess with POE

[Mark Brown]

On Thu, May 21, 2026 at 10:42:31AM +0100, Kevin Brodsky wrote:

> Add a new test to ensure that atomic futex uaccess succeeds on
> memory mapped with a non-default POIndex/pkey.

> +	ptr = mmap(NULL, size, PROT_READ | PROT_WRITE,
> +		   MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
> +	ASSERT_NE(ptr, MAP_FAILED);

Doesn't matter while there's only one test but we should probably
munmap() this when we're done.
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