Update from upstream with manual merge of Yasunori Goto's

changes to swiotlb.c made in commit 281dd25cdc0d6903929b79183816d151ea626341
since this file has been moved from arch/ia64/lib/swiotlb.c to
lib/swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

3 files changed, 12 insertions, 7 deletions

diff --git a/include/asm-ia64/futex.h b/include/asm-ia64/futex.h
index 2cac5ecd9d00..9feff4ce1424 100644
--- a/include/asm-ia64/futex.h
+++ b/include/asm-ia64/futex.h
@@ -14,7 +14,7 @@ futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
         int cmp = (encoded_op >> 24) & 15;
         int oparg = (encoded_op << 8) >> 20;
         int cmparg = (encoded_op << 20) >> 20;
-        int oldval = 0, ret, tem;
+        int oldval = 0, ret;
         if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
                 oparg = 1 << oparg;
 
diff --git a/include/asm-ia64/mca.h b/include/asm-ia64/mca.h
index 97a28b8b2ddd..c7d9c9ed38ba 100644
--- a/include/asm-ia64/mca.h
+++ b/include/asm-ia64/mca.h
@@ -80,7 +80,12 @@ struct ia64_sal_os_state {
         u64                     sal_ra;                 /* Return address in SAL, physical */
         u64                     sal_gp;                 /* GP of the SAL - physical */
         pal_min_state_area_t    *pal_min_state;         /* from R17.  physical in asm, virtual in C */
+        /* Previous values of IA64_KR(CURRENT) and IA64_KR(CURRENT_STACK).
+         * Note: if the MCA/INIT recovery code wants to resume to a new context
+         * then it must change these values to reflect the new kernel stack.
+         */
         u64                     prev_IA64_KR_CURRENT;   /* previous value of IA64_KR(CURRENT) */
+        u64                     prev_IA64_KR_CURRENT_STACK;
         struct task_struct      *prev_task;             /* previous task, NULL if it is not useful */
         /* Some interrupt registers are not saved in minstate, pt_regs or
          * switch_stack.  Because MCA/INIT can occur when interrupts are
diff --git a/include/asm-ia64/uaccess.h b/include/asm-ia64/uaccess.h
index 3a7829bb5954..9adb51211c22 100644
--- a/include/asm-ia64/uaccess.h
+++ b/include/asm-ia64/uaccess.h
@@ -187,8 +187,8 @@ extern void __get_user_unknown (void);
 ({                                                                                      \
         const __typeof__(*(ptr)) __user *__gu_ptr = (ptr);                              \
         __typeof__ (size) __gu_size = (size);                                           \
-        long __gu_err = -EFAULT, __gu_val = 0;                                          \
-                                                                                        \
+        long __gu_err = -EFAULT;                                                        \
+        unsigned long __gu_val = 0;                                                     \
         if (!check || __access_ok(__gu_ptr, size, segment))                             \
                 switch (__gu_size) {                                                    \
                       case 1: __get_user_size(__gu_val, __gu_ptr, 1, __gu_err); break;  \
@@ -240,13 +240,13 @@ extern unsigned long __must_check __copy_user (void __user *to, const void __use
 static inline unsigned long
 __copy_to_user (void __user *to, const void *from, unsigned long count)
 {
-        return __copy_user(to, (void __user *) from, count);
+        return __copy_user(to, (__force void __user *) from, count);
 }
 
 static inline unsigned long
 __copy_from_user (void *to, const void __user *from, unsigned long count)
 {
-        return __copy_user((void __user *) to, from, count);
+        return __copy_user((__force void __user *) to, from, count);
 }
 
 #define __copy_to_user_inatomic         __copy_to_user
@@ -258,7 +258,7 @@ __copy_from_user (void *to, const void __user *from, unsigned long count)
         long __cu_len = (n);                                                            \
                                                                                         \
         if (__access_ok(__cu_to, __cu_len, get_fs()))                                   \
-                __cu_len = __copy_user(__cu_to, (void __user *) __cu_from, __cu_len);   \
+                __cu_len = __copy_user(__cu_to, (__force void __user *) __cu_from, __cu_len);   \
         __cu_len;                                                                       \
 })
 
@@ -270,7 +270,7 @@ __copy_from_user (void *to, const void __user *from, unsigned long count)
                                                                                         \
         __chk_user_ptr(__cu_from);                                                      \
         if (__access_ok(__cu_from, __cu_len, get_fs()))                                 \
-                __cu_len = __copy_user((void __user *) __cu_to, __cu_from, __cu_len);   \
+                __cu_len = __copy_user((__force void __user *) __cu_to, __cu_from, __cu_len);   \
         __cu_len;                                                                       \
 })