Commit cf3e5050 authored Aug 08, 2008 by Jeremy Fitzhardinge Committed by Ingo Molnar Aug 11, 2008

x86: work around gcc 3.4.x bug



Simon Horman reported that gcc-3.4.x crashes when compiling
pgd_prepopulate_pmd() when PREALLOCATED_PMDS == 0 and CONFIG_DEBUG_INFO
is enabled.

Adding an extra check for PREALLOCATED_PMDS == 0 [which is compiled out
by gcc] seems to avoid the problem.

Reported-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent fb6bef80

arch/x86/mm/pgtable.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -207,6 +207,9 @@ static void pgd_prepopulate_pmd(struct mm_struct mm, pgd_t pgd, pmd_t *pmds[])
		unsigned long addr;
		int i;

		if (PREALLOCATED_PMDS == 0) /* Work around gcc-3.4.x bug */
		return;

		pud = pud_offset(pgd, 0);

		for (addr = i = 0; i < PREALLOCATED_PMDS;