summaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
authorHuang Ying <ying.huang@intel.com>2011-01-30 04:15:48 +0100
committerMarcelo Tosatti <mtosatti@redhat.com>2011-03-17 17:08:27 +0100
commit69ebb83e13e514222b0ae4f8bd813a17679ed876 (patch)
tree62ccc7ee1e840d0a6cc01a9fc1c44a5f4e6f1edd /drivers
parentmm: export __get_user_pages (diff)
downloadlinux-69ebb83e13e514222b0ae4f8bd813a17679ed876.tar.xz
linux-69ebb83e13e514222b0ae4f8bd813a17679ed876.zip
mm: make __get_user_pages return -EHWPOISON for HWPOISON page optionally
Make __get_user_pages return -EHWPOISON for HWPOISON page only if FOLL_HWPOISON is specified. With this patch, the interested callers can distinguish HWPOISON pages from general FAULT pages, while other callers will still get -EFAULT for all these pages, so the user space interface need not to be changed. This feature is needed by KVM, where UCR MCE should be relayed to guest for HWPOISON page, while instruction emulation and MMIO will be tried for general FAULT page. The idea comes from Andrew Morton. Signed-off-by: Huang Ying <ying.huang@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions