Commit 55920d31 authored Jul 23, 2016 by Andy Lutomirski Committed by Ingo Molnar Jul 23, 2016

x86/mm/cpa: Add missing comment in populate_pdg()



In commit:

  21cbc2822aa1 ("x86/mm/cpa: Unbreak populate_pgd(): stop trying to deallocate failed PUDs")

I intended to add this comment, but I failed at using git.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/242baf8612394f4e31216f96d13c4d2e9b90d1b7.1469293159.git.luto@kernel.org


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 530dd8d4

arch/x86/mm/pageattr.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1091,6 +1091,11 @@ static int populate_pgd(struct cpa_data *cpa, unsigned long addr)

		ret = populate_pud(cpa, addr, pgd_entry, pgprot);
		if (ret < 0) {
		/*
		* Leave the PUD page in place in case some other CPU or thread
		* already found it, but remove any useless entries we just
		* added to it.
		*/
		unmap_pud_range(pgd_entry, addr,
		addr + (cpa->numpages << PAGE_SHIFT));
		return ret;