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authorLinus Torvalds <torvalds@linux-foundation.org>2015-02-13 10:43:04 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-13 10:43:04 -0800
commitf1252515d901ee2a184a9d49a7f29ae14da823eb (patch)
treedeb2cd0776ace4fdb9614eb7f161e89dd2d76ee5 /arch/tile
parent8329aa9fff3fca84009e6a444d8d160193643bac (diff)
parent740e1433f50e6d0f1c4705c1a963645072f5a74c (diff)
downloadlinux-f1252515d901ee2a184a9d49a7f29ae14da823eb.tar.bz2
Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Pull arch/tile changes from Chris Metcalf: "Not much in this batch, just some minor cleanups" * git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: tile: change MAINTAINERS website from tilera.com to ezchip.com tile: enable sparse checks for get/put_user tile: fix put_user sparse errors tile: default to little endian on older toolchains
Diffstat (limited to 'arch/tile')
-rw-r--r--arch/tile/include/asm/uaccess.h37
-rw-r--r--arch/tile/include/uapi/asm/byteorder.h4
2 files changed, 21 insertions, 20 deletions
diff --git a/arch/tile/include/asm/uaccess.h b/arch/tile/include/asm/uaccess.h
index b6cde3209b96..f41cb53cf645 100644
--- a/arch/tile/include/asm/uaccess.h
+++ b/arch/tile/include/asm/uaccess.h
@@ -114,14 +114,14 @@ struct exception_table_entry {
extern int fixup_exception(struct pt_regs *regs);
/*
+ * This is a type: either unsigned long, if the argument fits into
+ * that type, or otherwise unsigned long long.
+ */
+#define __inttype(x) \
+ __typeof__(__builtin_choose_expr(sizeof(x) > sizeof(0UL), 0ULL, 0UL))
+
+/*
* Support macros for __get_user().
- *
- * Implementation note: The "case 8" logic of casting to the type of
- * the result of subtracting the value from itself is basically a way
- * of keeping all integer types the same, but casting any pointers to
- * ptrdiff_t, i.e. also an integer type. This way there are no
- * questionable casts seen by the compiler on an ILP32 platform.
- *
* Note that __get_user() and __put_user() assume proper alignment.
*/
@@ -178,7 +178,7 @@ extern int fixup_exception(struct pt_regs *regs);
"9:" \
: "=r" (ret), "=r" (__a), "=&r" (__b) \
: "r" (ptr), "i" (-EFAULT)); \
- (x) = (__typeof(x))(__typeof((x)-(x))) \
+ (x) = (__force __typeof(x))(__inttype(x)) \
(((u64)__hi32(__a, __b) << 32) | \
__lo32(__a, __b)); \
})
@@ -210,14 +210,16 @@ extern int __get_user_bad(void)
#define __get_user(x, ptr) \
({ \
int __ret; \
+ typeof(x) _x; \
__chk_user_ptr(ptr); \
switch (sizeof(*(ptr))) { \
- case 1: __get_user_1(x, ptr, __ret); break; \
- case 2: __get_user_2(x, ptr, __ret); break; \
- case 4: __get_user_4(x, ptr, __ret); break; \
- case 8: __get_user_8(x, ptr, __ret); break; \
+ case 1: __get_user_1(_x, ptr, __ret); break; \
+ case 2: __get_user_2(_x, ptr, __ret); break; \
+ case 4: __get_user_4(_x, ptr, __ret); break; \
+ case 8: __get_user_8(_x, ptr, __ret); break; \
default: __ret = __get_user_bad(); break; \
} \
+ (x) = (typeof(*(ptr))) _x; \
__ret; \
})
@@ -246,7 +248,7 @@ extern int __get_user_bad(void)
#define __put_user_4(x, ptr, ret) __put_user_asm(sw, x, ptr, ret)
#define __put_user_8(x, ptr, ret) \
({ \
- u64 __x = (__typeof((x)-(x)))(x); \
+ u64 __x = (__force __inttype(x))(x); \
int __lo = (int) __x, __hi = (int) (__x >> 32); \
asm volatile("1: { sw %1, %2; addi %0, %1, 4 }\n" \
"2: { sw %0, %3; movei %0, 0 }\n" \
@@ -289,12 +291,13 @@ extern int __put_user_bad(void)
#define __put_user(x, ptr) \
({ \
int __ret; \
+ typeof(*(ptr)) _x = (x); \
__chk_user_ptr(ptr); \
switch (sizeof(*(ptr))) { \
- case 1: __put_user_1(x, ptr, __ret); break; \
- case 2: __put_user_2(x, ptr, __ret); break; \
- case 4: __put_user_4(x, ptr, __ret); break; \
- case 8: __put_user_8(x, ptr, __ret); break; \
+ case 1: __put_user_1(_x, ptr, __ret); break; \
+ case 2: __put_user_2(_x, ptr, __ret); break; \
+ case 4: __put_user_4(_x, ptr, __ret); break; \
+ case 8: __put_user_8(_x, ptr, __ret); break; \
default: __ret = __put_user_bad(); break; \
} \
__ret; \
diff --git a/arch/tile/include/uapi/asm/byteorder.h b/arch/tile/include/uapi/asm/byteorder.h
index fb72ecf49218..6b8fa2e1cf6e 100644
--- a/arch/tile/include/uapi/asm/byteorder.h
+++ b/arch/tile/include/uapi/asm/byteorder.h
@@ -14,8 +14,6 @@
#if defined (__BIG_ENDIAN__)
#include <linux/byteorder/big_endian.h>
-#elif defined (__LITTLE_ENDIAN__)
-#include <linux/byteorder/little_endian.h>
#else
-#error "__BIG_ENDIAN__ or __LITTLE_ENDIAN__ must be defined."
+#include <linux/byteorder/little_endian.h>
#endif