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authorMark Salter <msalter@redhat.com>2009-10-01 18:44:01 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-10-01 19:11:12 -0400
commitd22a001bf6a502e978a8617e3f297b4d762cfbb5 (patch)
tree6291200ec18203153ff6e26a666bd7809659b371 /arch/mn10300
parent933d35f00cfaf99985515c7c212d9dee30b1a1fb (diff)
mn10300: fix kernel build failures when using gcc-4.x
Fix some build failures when using gcc-4.x for MN10300. Firstly, __get_user() fails to build because the pointer points to a const and __gu_val ends up being read-only: In file included from include/linux/mempolicy.h:62, from init/main.c:50: include/linux/pagemap.h: In function 'fault_in_pages_readable': include/linux/pagemap.h:394: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:394: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:394: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:400: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:400: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:400: error: read-only variable '__gu_val' used as 'asm' output make[1]: *** [init/main.o] Error 1 Secondly, gcc-4 doesn't allow casts of lvalues: UPD include/linux/compile.h arch/mn10300/kernel/rtc.c: In function 'calibrate_clock': arch/mn10300/kernel/rtc.c:170: error: lvalue required as left operand of assignment arch/mn10300/kernel/rtc.c:172: error: lvalue required as left operand of assignment make[1]: *** [arch/mn10300/kernel/rtc.o] Error 1 These are seen with gcc 4.2.1. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/mn10300')
-rw-r--r--arch/mn10300/include/asm/uaccess.h73
-rw-r--r--arch/mn10300/unit-asb2303/include/unit/clock.h6
-rw-r--r--arch/mn10300/unit-asb2305/include/unit/clock.h6
3 files changed, 45 insertions, 40 deletions
diff --git a/arch/mn10300/include/asm/uaccess.h b/arch/mn10300/include/asm/uaccess.h
index 8a3a4dd55763..167e10ff06d9 100644
--- a/arch/mn10300/include/asm/uaccess.h
+++ b/arch/mn10300/include/asm/uaccess.h
@@ -129,42 +129,47 @@ extern int fixup_exception(struct pt_regs *regs);
129struct __large_struct { unsigned long buf[100]; }; 129struct __large_struct { unsigned long buf[100]; };
130#define __m(x) (*(struct __large_struct *)(x)) 130#define __m(x) (*(struct __large_struct *)(x))
131 131
132#define __get_user_nocheck(x, ptr, size) \ 132#define __get_user_nocheck(x, ptr, size) \
133({ \ 133({ \
134 __typeof(*(ptr)) __gu_val; \ 134 unsigned long __gu_addr; \
135 unsigned long __gu_addr; \ 135 int __gu_err; \
136 int __gu_err; \ 136 __gu_addr = (unsigned long) (ptr); \
137 __gu_addr = (unsigned long) (ptr); \ 137 switch (size) { \
138 switch (size) { \ 138 case 1: { \
139 case 1: __get_user_asm("bu"); break; \ 139 unsigned char __gu_val; \
140 case 2: __get_user_asm("hu"); break; \ 140 __get_user_asm("bu"); \
141 case 4: __get_user_asm("" ); break; \ 141 (x) = *(__force __typeof__(*(ptr))*) &__gu_val; \
142 default: __get_user_unknown(); break; \ 142 break; \
143 } \ 143 } \
144 x = (__typeof__(*(ptr))) __gu_val; \ 144 case 2: { \
145 __gu_err; \ 145 unsigned short __gu_val; \
146 __get_user_asm("hu"); \
147 (x) = *(__force __typeof__(*(ptr))*) &__gu_val; \
148 break; \
149 } \
150 case 4: { \
151 unsigned int __gu_val; \
152 __get_user_asm(""); \
153 (x) = *(__force __typeof__(*(ptr))*) &__gu_val; \
154 break; \
155 } \
156 default: \
157 __get_user_unknown(); \
158 break; \
159 } \
160 __gu_err; \
146}) 161})
147 162
148#define __get_user_check(x, ptr, size) \ 163#define __get_user_check(x, ptr, size) \
149({ \ 164({ \
150 __typeof__(*(ptr)) __gu_val; \ 165 int _e; \
151 unsigned long __gu_addr; \ 166 if (likely(__access_ok((unsigned long) (ptr), (size)))) \
152 int __gu_err; \ 167 _e = __get_user_nocheck((x), (ptr), (size)); \
153 __gu_addr = (unsigned long) (ptr); \ 168 else { \
154 if (likely(__access_ok(__gu_addr,size))) { \ 169 _e = -EFAULT; \
155 switch (size) { \ 170 (x) = (__typeof__(x))0; \
156 case 1: __get_user_asm("bu"); break; \ 171 } \
157 case 2: __get_user_asm("hu"); break; \ 172 _e; \
158 case 4: __get_user_asm("" ); break; \
159 default: __get_user_unknown(); break; \
160 } \
161 } \
162 else { \
163 __gu_err = -EFAULT; \
164 __gu_val = 0; \
165 } \
166 x = (__typeof__(*(ptr))) __gu_val; \
167 __gu_err; \
168}) 173})
169 174
170#define __get_user_asm(INSN) \ 175#define __get_user_asm(INSN) \
diff --git a/arch/mn10300/unit-asb2303/include/unit/clock.h b/arch/mn10300/unit-asb2303/include/unit/clock.h
index 8b450e920af1..2a0bf79ab968 100644
--- a/arch/mn10300/unit-asb2303/include/unit/clock.h
+++ b/arch/mn10300/unit-asb2303/include/unit/clock.h
@@ -20,9 +20,9 @@ extern unsigned long mn10300_ioclk; /* IOCLK (crystal speed) in HZ */
20extern unsigned long mn10300_iobclk; 20extern unsigned long mn10300_iobclk;
21extern unsigned long mn10300_tsc_per_HZ; 21extern unsigned long mn10300_tsc_per_HZ;
22 22
23#define MN10300_IOCLK ((unsigned long)mn10300_ioclk) 23#define MN10300_IOCLK mn10300_ioclk
24/* If this processors has a another clock, uncomment the below. */ 24/* If this processors has a another clock, uncomment the below. */
25/* #define MN10300_IOBCLK ((unsigned long)mn10300_iobclk) */ 25/* #define MN10300_IOBCLK mn10300_iobclk */
26 26
27#else /* !CONFIG_MN10300_RTC */ 27#else /* !CONFIG_MN10300_RTC */
28 28
@@ -35,7 +35,7 @@ extern unsigned long mn10300_tsc_per_HZ;
35#define MN10300_TSCCLK MN10300_IOCLK 35#define MN10300_TSCCLK MN10300_IOCLK
36 36
37#ifdef CONFIG_MN10300_RTC 37#ifdef CONFIG_MN10300_RTC
38#define MN10300_TSC_PER_HZ ((unsigned long)mn10300_tsc_per_HZ) 38#define MN10300_TSC_PER_HZ mn10300_tsc_per_HZ
39#else /* !CONFIG_MN10300_RTC */ 39#else /* !CONFIG_MN10300_RTC */
40#define MN10300_TSC_PER_HZ (MN10300_TSCCLK/HZ) 40#define MN10300_TSC_PER_HZ (MN10300_TSCCLK/HZ)
41#endif /* !CONFIG_MN10300_RTC */ 41#endif /* !CONFIG_MN10300_RTC */
diff --git a/arch/mn10300/unit-asb2305/include/unit/clock.h b/arch/mn10300/unit-asb2305/include/unit/clock.h
index 7d514841ffda..67be3f2eb18e 100644
--- a/arch/mn10300/unit-asb2305/include/unit/clock.h
+++ b/arch/mn10300/unit-asb2305/include/unit/clock.h
@@ -20,9 +20,9 @@ extern unsigned long mn10300_ioclk; /* IOCLK (crystal speed) in HZ */
20extern unsigned long mn10300_iobclk; 20extern unsigned long mn10300_iobclk;
21extern unsigned long mn10300_tsc_per_HZ; 21extern unsigned long mn10300_tsc_per_HZ;
22 22
23#define MN10300_IOCLK ((unsigned long)mn10300_ioclk) 23#define MN10300_IOCLK mn10300_ioclk
24/* If this processors has a another clock, uncomment the below. */ 24/* If this processors has a another clock, uncomment the below. */
25/* #define MN10300_IOBCLK ((unsigned long)mn10300_iobclk) */ 25/* #define MN10300_IOBCLK mn10300_iobclk */
26 26
27#else /* !CONFIG_MN10300_RTC */ 27#else /* !CONFIG_MN10300_RTC */
28 28
@@ -35,7 +35,7 @@ extern unsigned long mn10300_tsc_per_HZ;
35#define MN10300_TSCCLK MN10300_IOCLK 35#define MN10300_TSCCLK MN10300_IOCLK
36 36
37#ifdef CONFIG_MN10300_RTC 37#ifdef CONFIG_MN10300_RTC
38#define MN10300_TSC_PER_HZ ((unsigned long)mn10300_tsc_per_HZ) 38#define MN10300_TSC_PER_HZ mn10300_tsc_per_HZ
39#else /* !CONFIG_MN10300_RTC */ 39#else /* !CONFIG_MN10300_RTC */
40#define MN10300_TSC_PER_HZ (MN10300_TSCCLK/HZ) 40#define MN10300_TSC_PER_HZ (MN10300_TSCCLK/HZ)
41#endif /* !CONFIG_MN10300_RTC */ 41#endif /* !CONFIG_MN10300_RTC */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-30 01:51:40 -0500