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-rw-r--r--arch/alpha/include/asm/errno.h2
-rw-r--r--arch/mips/include/asm/errno.h2
-rw-r--r--arch/parisc/include/asm/errno.h2
-rw-r--r--arch/sparc/include/asm/errno.h2
-rw-r--r--include/asm-generic/errno.h2
-rw-r--r--include/linux/mm.h1
-rw-r--r--mm/memory.c13
7 files changed, 21 insertions, 3 deletions
diff --git a/arch/alpha/include/asm/errno.h b/arch/alpha/include/asm/errno.h
index 98099bda937..e5f29ca2818 100644
--- a/arch/alpha/include/asm/errno.h
+++ b/arch/alpha/include/asm/errno.h
@@ -122,4 +122,6 @@
#define ERFKILL 138 /* Operation not possible due to RF-kill */
+#define EHWPOISON 139 /* Memory page has hardware error */
+
#endif
diff --git a/arch/mips/include/asm/errno.h b/arch/mips/include/asm/errno.h
index a0efc73819e..6dcd3583ed0 100644
--- a/arch/mips/include/asm/errno.h
+++ b/arch/mips/include/asm/errno.h
@@ -121,6 +121,8 @@
#define ERFKILL 167 /* Operation not possible due to RF-kill */
+#define EHWPOISON 168 /* Memory page has hardware error */
+
#define EDQUOT 1133 /* Quota exceeded */
#ifdef __KERNEL__
diff --git a/arch/parisc/include/asm/errno.h b/arch/parisc/include/asm/errno.h
index 9992abdd782..135ad6047e5 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
diff --git a/arch/sparc/include/asm/errno.h b/arch/sparc/include/asm/errno.h
index 4e2bc490d71..c351aba997b 100644
--- a/arch/sparc/include/asm/errno.h
+++ b/arch/sparc/include/asm/errno.h
@@ -112,4 +112,6 @@
#define ERFKILL 134 /* Operation not possible due to RF-kill */
+#define EHWPOISON 135 /* Memory page has hardware error */
+
#endif
diff --git a/include/asm-generic/errno.h b/include/asm-generic/errno.h
index 28cc03bf19e..a1331ce5044 100644
--- a/include/asm-generic/errno.h
+++ b/include/asm-generic/errno.h
@@ -108,4 +108,6 @@
#define ERFKILL 132 /* Operation not possible due to RF-kill */
+#define EHWPOISON 133 /* Memory page has hardware error */
+
#endif
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 46150c66318..a77c82c56e0 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1532,6 +1532,7 @@ struct page *follow_page(struct vm_area_struct *, unsigned long address,
#define FOLL_FORCE 0x10 /* get_user_pages read/write w/o permission */
#define FOLL_MLOCK 0x40 /* mark page as mlocked */
#define FOLL_SPLIT 0x80 /* don't return transhuge pages, split them */
+#define FOLL_HWPOISON 0x100 /* check page is hwpoisoned */
typedef int (*pte_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr,
void *data);
diff --git a/mm/memory.c b/mm/memory.c
index 806a37ec71b..346ee7e041f 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1576,9 +1576,16 @@ int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
if (ret & VM_FAULT_ERROR) {
if (ret & VM_FAULT_OOM)
return i ? i : -ENOMEM;
- if (ret &
- (VM_FAULT_HWPOISON|VM_FAULT_HWPOISON_LARGE|
- VM_FAULT_SIGBUS))
+ if (ret & (VM_FAULT_HWPOISON |
+ VM_FAULT_HWPOISON_LARGE)) {
+ if (i)
+ return i;
+ else if (gup_flags & FOLL_HWPOISON)
+ return -EHWPOISON;
+ else
+ return -EFAULT;
+ }
+ if (ret & VM_FAULT_SIGBUS)
return i ? i : -EFAULT;
BUG();
}