4.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Minfei Huang <mnfhuang@xxxxxxxxx> commit 9962eea9e55f797f05f20ba6448929cab2a9f018 upstream. The variable pmd_idx is not initialized for the first iteration of the for loop. Assign the proper value which indexes the start address. Fixes: 719272c45b82 'x86, mm: only call early_ioremap_page_table_range_init() once' Signed-off-by: Minfei Huang <mnfhuang@xxxxxxxxx> Cc: tony.luck@xxxxxxxxx Cc: wangnan0@xxxxxxxxxx Cc: david.vrabel@xxxxxxxxxx Reviewed-by: yinghai@xxxxxxxxxx Link: http://lkml.kernel.org/r/1436703522-29552-1-git-send-email-mhuang@xxxxxxxxxx Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/x86/mm/init_32.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -137,6 +137,7 @@ page_table_range_init_count(unsigned lon vaddr = start; pgd_idx = pgd_index(vaddr); + pmd_idx = pmd_index(vaddr); for ( ; (pgd_idx < PTRS_PER_PGD) && (vaddr != end); pgd_idx++) { for (; (pmd_idx < PTRS_PER_PMD) && (vaddr != end); -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html