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Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

Browse Source 
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
This commit is contained in:
Linus Torvalds 2015-02-13 10:43:04 -08:00
commit f1252515d9
3 changed files with 22 additions and 21 deletions
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2
MAINTAINERS
View File

@ -9726,7 +9726,7 @@ F: net/tipc/
TILE ARCHITECTURE
M: Chris Metcalf <cmetcalf@ezchip.com>
W: http://www.tilera.com/scm/
W: http://www.ezchip.com/scm/
S: Supported
F: arch/tile/
F: drivers/char/tile-srom.c

37
arch/tile/include/asm/uaccess.h
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@ -113,15 +113,15 @@ 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; \

4
arch/tile/include/uapi/asm/byteorder.h
View File

@ -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