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Commit 69b1415e authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar
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x86: cpa: ensure page alignment 



the cpa API is page aligned - warn about any weird alignments.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 7bfeab9a

arch/x86/mm/pageattr.c

+9 −0
Original line number Diff line number Diff line
@@ -688,6 +688,15 @@ static int change_page_attr_set_clr(unsigned long addr, int numpages, 
	if (!pgprot_val(mask_set) && !pgprot_val(mask_clr))

		return 0;



	/* Ensure we are PAGE_SIZE aligned */

	if (addr & ~PAGE_MASK) {

		addr &= PAGE_MASK;

		/*

		 * People should not be passing in unaligned addresses:

		 */

		WARN_ON_ONCE(1);

	}



	cpa.vaddr = addr;

	cpa.numpages = numpages;

	cpa.mask_set = mask_set;