Merge remote-tracking branch 'asoc/topic/dmaengine' into asoc-next

[karo-tx-linux.git] / arch / x86 / include / asm / uaccess.h

diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index 2131c4ce7d8a10698c45626e2781dd8f1cb2f9b9..ea148313570f6e6d1a7ba34ba18f49ce7928569f 100644 (file)
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -11,6 +11,7 @@
 #include <asm/asm.h>
 #include <asm/page.h>
 #include <asm/smap.h>
+#include <asm/extable.h>
 
 #define VERIFY_READ 0
 #define VERIFY_WRITE 1
@@ -67,6 +68,12 @@ static inline bool __chk_range_not_ok(unsigned long addr, unsigned long size, un
        __chk_range_not_ok((unsigned long __force)(addr), size, limit); \
 })
 
+#ifdef CONFIG_DEBUG_ATOMIC_SLEEP
+# define WARN_ON_IN_IRQ()      WARN_ON_ONCE(!in_task())
+#else
+# define WARN_ON_IN_IRQ()
+#endif
+
 /**
  * access_ok: - Checks if a user space pointer is valid
  * @type: Type of access: %VERIFY_READ or %VERIFY_WRITE.  Note that
@@ -87,39 +94,11 @@ static inline bool __chk_range_not_ok(unsigned long addr, unsigned long size, un
  * checks that the pointer is in the user space range - after calling
  * this function, memory access functions may still return -EFAULT.
  */
-#define access_ok(type, addr, size) \
-       likely(!__range_not_ok(addr, size, user_addr_max()))
-
-/*
- * The exception table consists of triples of addresses relative to the
- * exception table entry itself. The first address is of an instruction
- * that is allowed to fault, the second is the target at which the program
- * should continue. The third is a handler function to deal with the fault
- * caused by the instruction in the first field.
- *
- * All the routines below use bits of fixup code that are out of line
- * with the main instruction path.  This means when everything is well,
- * we don't even have to jump over them.  Further, they do not intrude
- * on our cache or tlb entries.
- */
-
-struct exception_table_entry {
-       int insn, fixup, handler;
-};
-
-#define ARCH_HAS_RELATIVE_EXTABLE
-
-#define swap_ex_entry_fixup(a, b, tmp, delta)                  \
-       do {                                                    \
-               (a)->fixup = (b)->fixup + (delta);              \
-               (b)->fixup = (tmp).fixup - (delta);             \
-               (a)->handler = (b)->handler + (delta);          \
-               (b)->handler = (tmp).handler - (delta);         \
-       } while (0)
-
-extern int fixup_exception(struct pt_regs *regs, int trapnr);
-extern bool ex_has_fault_handler(unsigned long ip);
-extern void early_fixup_exception(struct pt_regs *regs, int trapnr);
+#define access_ok(type, addr, size)                                    \
+({                                                                     \
+       WARN_ON_IN_IRQ();                                               \
+       likely(!__range_not_ok(addr, size, user_addr_max()));           \
+})
 
 /*
  * These are the main single-value transfer routines.  They automatically