From 63028aa7f581d9d4e6889f9dc06ded2534250a76 Mon Sep 17 00:00:00 2001 From: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Date: Wed, 24 Aug 2005 18:03:43 -0400 Subject: [IA64] page_not_present fault in region 5 is normal When copying data from user-space to kernel-space by __copy_user(), a page_not_present fault sometimes occurs at vmalloced kernel address because of VHPT pre-fetching. Ignore the page_not_present fault in ia64_do_page_fault() before jumping into exception handlers. Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Tony Luck <tony.luck@intel.com> --- arch/ia64/mm/fault.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/ia64/mm') diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c index ff62551eb3a1..839d4f1234ee 100644 --- a/arch/ia64/mm/fault.c +++ b/arch/ia64/mm/fault.c @@ -229,9 +229,6 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re return; } - if (ia64_done_with_exception(regs)) - return; - /* * Since we have no vma's for region 5, we might get here even if the address is * valid, due to the VHPT walker inserting a non present translation that becomes @@ -242,6 +239,9 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re if (REGION_NUMBER(address) == 5 && mapped_kernel_page_is_present(address)) return; + if (ia64_done_with_exception(regs)) + return; + /* * Oops. The kernel tried to access some bad page. We'll have to terminate things * with extreme prejudice. -- cgit v1.2.3