[Xen-devel] [PATCH] x86: work around gcc 3.4.x bug

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

gcc-3.4.x crashes when compiling pgd_prepopulate_pmd() when
PREALLOCATED_PMDS == 0 and CONFIG_DEBUG_INFO is enabled.  This seems
to avoid the problem.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
Cc: Adrian Bunk <bunk@xxxxxxxxxx>
Cc: Simon Horman <horms@xxxxxxxxxxxx>
Cc: Dhaval Giani <dhaval@xxxxxxxxxxxxxxxxxx>
---
arch/x86/mm/pgtable.c |    3 +++
1 file changed, 3 insertions(+)

===================================================================
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -207,6 +207,9 @@
        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;



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