powerpc: fix __strnlen_user in merge tree
Change USER/KERNEL_DS so that the merged version of __strnlen_user can be used which allows us to complete the removal of arch/ppc64/lib/. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
This commit is contained in:
Stephen Rothwell
@@ -24,11 +24,11 @@
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#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
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#ifdef __powerpc64__
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#define KERNEL_DS MAKE_MM_SEG(0UL)
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#define USER_DS MAKE_MM_SEG(0xf000000000000000UL)
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#else
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#define KERNEL_DS MAKE_MM_SEG(~0UL)
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#ifdef __powerpc64__
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/* We use TASK_SIZE_USER64 as TASK_SIZE is not constant */
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#define USER_DS MAKE_MM_SEG(TASK_SIZE_USER64 - 1)
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#else
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#define USER_DS MAKE_MM_SEG(TASK_SIZE - 1)
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#endif
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@@ -40,22 +40,11 @@
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#ifdef __powerpc64__
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/*
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* Use the alpha trick for checking ranges:
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*
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* Is a address valid? This does a straightforward calculation rather
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* than tests.
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*
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* Address valid if:
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* - "addr" doesn't have any high-bits set
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* - AND "size" doesn't have any high-bits set
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* - OR we are in kernel mode.
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*
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* We dont have to check for high bits in (addr+size) because the first
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* two checks force the maximum result to be below the start of the
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* kernel region.
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* This check is sufficient because there is a large enough
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* gap between user addresses and the kernel addresses
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*/
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#define __access_ok(addr, size, segment) \
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(((segment).seg & (addr | size )) == 0)
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(((addr) <= (segment).seg) && ((size) <= (segment).seg))
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#else
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@@ -161,7 +150,10 @@ extern long __put_user_bad(void);
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: "=r" (err) \
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: "r" (x), "b" (addr), "i" (-EFAULT), "0" (err))
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#ifndef __powerpc64__
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#ifdef __powerpc64__
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#define __put_user_asm2(x, ptr, retval) \
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__put_user_asm(x, ptr, retval, "std")
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#else /* __powerpc64__ */
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#define __put_user_asm2(x, addr, err) \
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__asm__ __volatile__( \
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"1: stw %1,0(%2)\n" \
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@@ -178,9 +170,6 @@ extern long __put_user_bad(void);
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".previous" \
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: "=r" (err) \
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: "r" (x), "b" (addr), "i" (-EFAULT), "0" (err))
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#else /* __powerpc64__ */
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#define __put_user_asm2(x, ptr, retval) \
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__put_user_asm(x, ptr, retval, "std")
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#endif /* __powerpc64__ */
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#define __put_user_size(x, ptr, size, retval) \
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@@ -218,7 +207,7 @@ extern long __get_user_bad(void);
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#define __get_user_asm(x, addr, err, op) \
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__asm__ __volatile__( \
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"1: "op" %1,0(%2) # get_user\n" \
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"1: "op" %1,0(%2) # get_user\n" \
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"2:\n" \
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".section .fixup,\"ax\"\n" \
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"3: li %0,%3\n" \
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@@ -232,8 +221,11 @@ extern long __get_user_bad(void);
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: "=r" (err), "=r" (x) \
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: "b" (addr), "i" (-EFAULT), "0" (err))
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#ifndef __powerpc64__
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#define __get_user_asm2(x, addr, err) \
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#ifdef __powerpc64__
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#define __get_user_asm2(x, addr, err) \
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__get_user_asm(x, addr, err, "ld")
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#else /* __powerpc64__ */
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#define __get_user_asm2(x, addr, err) \
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__asm__ __volatile__( \
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"1: lwz %1,0(%2)\n" \
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"2: lwz %1+1,4(%2)\n" \
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@@ -251,17 +243,14 @@ extern long __get_user_bad(void);
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".previous" \
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: "=r" (err), "=&r" (x) \
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: "b" (addr), "i" (-EFAULT), "0" (err))
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#else
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#define __get_user_asm2(x, addr, err) \
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__get_user_asm(x, addr, err, "ld")
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#endif /* __powerpc64__ */
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#define __get_user_size(x, ptr, size, retval) \
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do { \
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retval = 0; \
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__chk_user_ptr(ptr); \
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if (size > sizeof(x)) \
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(x) = __get_user_bad(); \
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if (size > sizeof(x)) \
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(x) = __get_user_bad(); \
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switch (size) { \
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case 1: __get_user_asm(x, ptr, retval, "lbz"); break; \
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case 2: __get_user_asm(x, ptr, retval, "lhz"); break; \
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@@ -300,7 +289,7 @@ do { \
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long __gu_err = -EFAULT; \
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unsigned long __gu_val = 0; \
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const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
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might_sleep(); \
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might_sleep(); \
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if (access_ok(VERIFY_READ, __gu_addr, (size))) \
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__get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
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(x) = (__typeof__(*(ptr)))__gu_val; \
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@@ -313,8 +302,9 @@ extern unsigned long __copy_tofrom_user(void __user *to,
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const void __user *from, unsigned long size);
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#ifndef __powerpc64__
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extern inline unsigned long
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copy_from_user(void *to, const void __user *from, unsigned long n)
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extern inline unsigned long copy_from_user(void *to,
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const void __user *from, unsigned long n)
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{
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unsigned long over;
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@@ -328,8 +318,8 @@ copy_from_user(void *to, const void __user *from, unsigned long n)
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return n;
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}
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extern inline unsigned long
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copy_to_user(void __user *to, const void *from, unsigned long n)
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extern inline unsigned long copy_to_user(void __user *to,
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const void *from, unsigned long n)
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{
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unsigned long over;
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@@ -343,10 +333,23 @@ copy_to_user(void __user *to, const void *from, unsigned long n)
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return n;
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}
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#define __copy_to_user_inatomic __copy_to_user
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#define __copy_from_user_inatomic __copy_from_user
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#else /* __powerpc64__ */
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static inline unsigned long
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__copy_from_user_inatomic(void *to, const void __user *from, unsigned long n)
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#define __copy_in_user(to, from, size) \
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__copy_tofrom_user((to), (from), (size))
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extern unsigned long copy_from_user(void *to, const void __user *from,
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unsigned long n);
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extern unsigned long copy_to_user(void __user *to, const void *from,
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unsigned long n);
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extern unsigned long copy_in_user(void __user *to, const void __user *from,
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unsigned long n);
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static inline unsigned long __copy_from_user_inatomic(void *to,
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const void __user *from, unsigned long n)
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{
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if (__builtin_constant_p(n) && (n <= 8)) {
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unsigned long ret;
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@@ -370,8 +373,8 @@ __copy_from_user_inatomic(void *to, const void __user *from, unsigned long n)
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return __copy_tofrom_user((__force void __user *) to, from, n);
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}
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static inline unsigned long
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__copy_to_user_inatomic(void __user *to, const void *from, unsigned long n)
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static inline unsigned long __copy_to_user_inatomic(void __user *to,
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const void *from, unsigned long n)
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{
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if (__builtin_constant_p(n) && (n <= 8)) {
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unsigned long ret;
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@@ -397,8 +400,8 @@ __copy_to_user_inatomic(void __user *to, const void *from, unsigned long n)
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#endif /* __powerpc64__ */
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static inline unsigned long
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__copy_from_user(void *to, const void __user *from, unsigned long size)
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static inline unsigned long __copy_from_user(void *to,
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const void __user *from, unsigned long size)
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{
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might_sleep();
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#ifndef __powerpc64__
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@@ -408,8 +411,8 @@ __copy_from_user(void *to, const void __user *from, unsigned long size)
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#endif /* __powerpc64__ */
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}
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static inline unsigned long
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__copy_to_user(void __user *to, const void *from, unsigned long size)
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static inline unsigned long __copy_to_user(void __user *to,
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const void *from, unsigned long size)
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{
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might_sleep();
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#ifndef __powerpc64__
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@@ -419,21 +422,6 @@ __copy_to_user(void __user *to, const void *from, unsigned long size)
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#endif /* __powerpc64__ */
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}
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#ifndef __powerpc64__
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#define __copy_to_user_inatomic __copy_to_user
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#define __copy_from_user_inatomic __copy_from_user
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#else /* __powerpc64__ */
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#define __copy_in_user(to, from, size) \
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__copy_tofrom_user((to), (from), (size))
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extern unsigned long copy_from_user(void *to, const void __user *from,
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unsigned long n);
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extern unsigned long copy_to_user(void __user *to, const void *from,
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unsigned long n);
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extern unsigned long copy_in_user(void __user *to, const void __user *from,
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unsigned long n);
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#endif /* __powerpc64__ */
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extern unsigned long __clear_user(void __user *addr, unsigned long size);
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static inline unsigned long clear_user(void __user *addr, unsigned long size)
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@@ -466,11 +454,7 @@ static inline long strncpy_from_user(char *dst, const char __user *src,
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*
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* Return 0 for error
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*/
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#ifndef __powerpc64__
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extern int __strnlen_user(const char __user *str, long len, unsigned long top);
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#else /* __powerpc64__ */
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extern int __strnlen_user(const char __user *str, long len);
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#endif /* __powerpc64__ */
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/*
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* Returns the length of the string at str (including the null byte),
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@@ -482,18 +466,11 @@ extern int __strnlen_user(const char __user *str, long len);
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*/
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static inline int strnlen_user(const char __user *str, long len)
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{
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#ifndef __powerpc64__
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unsigned long top = current->thread.fs.seg;
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if ((unsigned long)str > top)
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return 0;
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return __strnlen_user(str, len, top);
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#else /* __powerpc64__ */
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might_sleep();
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if (likely(access_ok(VERIFY_READ, str, 1)))
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return __strnlen_user(str, len);
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return 0;
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#endif /* __powerpc64__ */
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}
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#define strlen_user(str) strnlen_user((str), 0x7ffffffe)
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