From mboxrd@z Thu Jan 1 00:00:00 1970 From: catalin.marinas@arm.com (Catalin Marinas) Date: Fri, 12 Nov 2010 18:00:29 +0000 Subject: [PATCH v2 09/20] ARM: LPAE: Change setup_mm_for_reboot() to work with LPAE In-Reply-To: <1289584840-18097-1-git-send-email-catalin.marinas@arm.com> References: <1289584840-18097-1-git-send-email-catalin.marinas@arm.com> Message-ID: <1289584840-18097-10-git-send-email-catalin.marinas@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This function was assuming that there are only two levels of page tables. The patch changes looping over the PMD entries to make it compatible with LPAE. Signed-off-by: Catalin Marinas --- arch/arm/mm/mmu.c | 7 +++++-- 1 files changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 4147cc6..3784acc 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -1098,13 +1098,16 @@ void setup_mm_for_reboot(char mode) if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale()) base_pmdval |= PMD_BIT4; - for (i = 0; i < FIRST_USER_PGD_NR + USER_PTRS_PER_PGD; i++, pgd++) { + for (i = 0; i < TASK_SIZE >> PMD_SHIFT; i++) { unsigned long pmdval = (i << PMD_SHIFT) | base_pmdval; pmd_t *pmd; + unsigned long addr = i << PMD_SHIFT; - pmd = pmd_off(pgd, i << PMD_SHIFT); + pmd = pmd_off(pgd + pgd_index(addr), addr); pmd[0] = __pmd(pmdval); +#ifndef CONFIG_ARM_LPAE pmd[1] = __pmd(pmdval + (1 << (PMD_SHIFT - 1))); +#endif flush_pmd_entry(pmd); }