pkeys: Remove easily triggered WARN
This easy-to-trigger warning shows up instantly when running Trinity on a kernel with CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS disabled. At most this should have been a printk, but the -EINVAL alone should be more than adequate indicator that something isn't available. Signed-off-by: NDave Jones <davej@codemonkey.org.uk> Acked-by: NDave Hansen <dave.hansen@linux.intel.com> Cc: linux-arch@vger.kernel.org Cc: arnd@arndb.de Cc: linux-api@vger.kernel.org Cc: linux-mm@kvack.org Cc: luto@kernel.org Cc: torvalds@linux-foundation.org Cc: akpm@linux-foundation.org Cc: mgorman@techsingularity.net Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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