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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
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+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;