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authorJeremy Fitzhardinge <jeremy@goop.org>2008-08-08 13:46:07 -0700
committerIngo Molnar <mingo@elte.hu>2008-08-11 18:44:02 +0200
commitcf3e50501259f9a7cb108a69c3e1b912135628f6 (patch)
treec4df8af1ad310728845b2a8f8c5153210cb48f2d
parentfb6bef8002d54a9c3062abc281893ec7c896d3ce (diff)
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>
-rw-r--r--arch/x86/mm/pgtable.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 557b2abceef..d50302774fe 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -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;