diff options
| author | Huang Ying <ying.huang@intel.com> | 2011-01-30 11:15:48 +0800 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2011-03-17 13:08:27 -0300 |
| commit | 69ebb83e13e514222b0ae4f8bd813a17679ed876 (patch) | |
| tree | 62ccc7ee1e840d0a6cc01a9fc1c44a5f4e6f1edd /arch/parisc | |
| parent | 0014bd990e69063b0fb78940b35439d7980ce3ee (diff) | |
| download | linux-69ebb83e13e514222b0ae4f8bd813a17679ed876.tar.gz | |
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 'arch/parisc')
| -rw-r--r-- | arch/parisc/include/asm/errno.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/errno.h b/arch/parisc/include/asm/errno.h index 9992abdd782d..135ad6047e51 100644 --- a/arch/parisc/include/asm/errno.h +++ b/arch/parisc/include/asm/errno.h @@ -122,4 +122,6 @@ #define ERFKILL 256 /* Operation not possible due to RF-kill */ +#define EHWPOISON 257 /* Memory page has hardware error */ + #endif |