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| author | Kiyoshi Ueda <k-ueda@ct.jp.nec.com> | 2005-08-24 18:03:43 -0400 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2005-09-06 16:06:58 -0700 |
| commit | 63028aa7f581d9d4e6889f9dc06ded2534250a76 (patch) | |
| tree | 6167c2325aae1341161c41a1c9ce83e91fca2990 | |
| parent | 4706df3d3c42af802597d82c8b1542c3d52eab23 (diff) | |
| download | linux-stable-63028aa7f581d9d4e6889f9dc06ded2534250a76.tar.gz linux-stable-63028aa7f581d9d4e6889f9dc06ded2534250a76.tar.bz2 linux-stable-63028aa7f581d9d4e6889f9dc06ded2534250a76.zip | |
[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>
| -rw-r--r-- | arch/ia64/mm/fault.c | 6 |
1 files changed, 3 insertions, 3 deletions
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. |