diff options
Diffstat (limited to 'arch/tile/include/asm')
| -rw-r--r-- | arch/tile/include/asm/Kbuild | 1 | ||||
| -rw-r--r-- | arch/tile/include/asm/pgtable_32.h | 1 | ||||
| -rw-r--r-- | arch/tile/include/asm/pgtable_64.h | 1 | ||||
| -rw-r--r-- | arch/tile/include/asm/uaccess.h | 162 |
4 files changed, 11 insertions, 154 deletions
diff --git a/arch/tile/include/asm/Kbuild b/arch/tile/include/asm/Kbuild index aa48b6eaff2d..24c44e93804d 100644 --- a/arch/tile/include/asm/Kbuild +++ b/arch/tile/include/asm/Kbuild @@ -7,6 +7,7 @@ generic-y += clkdev.h generic-y += emergency-restart.h generic-y += errno.h generic-y += exec.h +generic-y += extable.h generic-y += fb.h generic-y += fcntl.h generic-y += hw_irq.h diff --git a/arch/tile/include/asm/pgtable_32.h b/arch/tile/include/asm/pgtable_32.h index d26a42279036..5f8c615cb5e9 100644 --- a/arch/tile/include/asm/pgtable_32.h +++ b/arch/tile/include/asm/pgtable_32.h @@ -74,6 +74,7 @@ extern unsigned long VMALLOC_RESERVE /* = CONFIG_VMALLOC_RESERVE */; #define MAXMEM (_VMALLOC_START - PAGE_OFFSET) /* We have no pmd or pud since we are strictly a two-level page table */ +#define __ARCH_USE_5LEVEL_HACK #include <asm-generic/pgtable-nopmd.h> static inline int pud_huge_page(pud_t pud) { return 0; } diff --git a/arch/tile/include/asm/pgtable_64.h b/arch/tile/include/asm/pgtable_64.h index e96cec52f6d8..96fe58b45118 100644 --- a/arch/tile/include/asm/pgtable_64.h +++ b/arch/tile/include/asm/pgtable_64.h @@ -59,6 +59,7 @@ #ifndef __ASSEMBLY__ /* We have no pud since we are a three-level page table. */ +#define __ARCH_USE_5LEVEL_HACK #include <asm-generic/pgtable-nopud.h> /* diff --git a/arch/tile/include/asm/uaccess.h b/arch/tile/include/asm/uaccess.h index 14ea3d1ca2c7..a803f6bb4d92 100644 --- a/arch/tile/include/asm/uaccess.h +++ b/arch/tile/include/asm/uaccess.h @@ -98,24 +98,7 @@ int __range_ok(unsigned long addr, unsigned long size); likely(__range_ok((unsigned long)(addr), (size)) == 0); \ }) -/* - * The exception table consists of pairs of addresses: the first is the - * address of an instruction that is allowed to fault, and the second is - * the address at which the program should continue. No registers are - * modified, so it is entirely up to the continuation code to figure out - * what to do. - * - * 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 { - unsigned long insn, fixup; -}; - -extern int fixup_exception(struct pt_regs *regs); +#include <asm/extable.h> /* * This is a type: either unsigned long, if the argument fits into @@ -330,145 +313,16 @@ extern int __put_user_bad(void) ((x) = 0, -EFAULT); \ }) -/** - * __copy_to_user() - copy data into user space, with less checking. - * @to: Destination address, in user space. - * @from: Source address, in kernel space. - * @n: Number of bytes to copy. - * - * Context: User context only. This function may sleep if pagefaults are - * enabled. - * - * Copy data from kernel space to user space. Caller must check - * the specified block with access_ok() before calling this function. - * - * Returns number of bytes that could not be copied. - * On success, this will be zero. - * - * An alternate version - __copy_to_user_inatomic() - is designed - * to be called from atomic context, typically bracketed by calls - * to pagefault_disable() and pagefault_enable(). - */ -extern unsigned long __must_check __copy_to_user_inatomic( - void __user *to, const void *from, unsigned long n); - -static inline unsigned long __must_check -__copy_to_user(void __user *to, const void *from, unsigned long n) -{ - might_fault(); - return __copy_to_user_inatomic(to, from, n); -} - -static inline unsigned long __must_check -copy_to_user(void __user *to, const void *from, unsigned long n) -{ - if (access_ok(VERIFY_WRITE, to, n)) - n = __copy_to_user(to, from, n); - return n; -} - -/** - * __copy_from_user() - copy data from user space, with less checking. - * @to: Destination address, in kernel space. - * @from: Source address, in user space. - * @n: Number of bytes to copy. - * - * Context: User context only. This function may sleep if pagefaults are - * enabled. - * - * Copy data from user space to kernel space. Caller must check - * the specified block with access_ok() before calling this function. - * - * Returns number of bytes that could not be copied. - * On success, this will be zero. - * - * If some data could not be copied, this function will pad the copied - * data to the requested size using zero bytes. - * - * An alternate version - __copy_from_user_inatomic() - is designed - * to be called from atomic context, typically bracketed by calls - * to pagefault_disable() and pagefault_enable(). This version - * does *NOT* pad with zeros. - */ -extern unsigned long __must_check __copy_from_user_inatomic( - void *to, const void __user *from, unsigned long n); -extern unsigned long __must_check __copy_from_user_zeroing( - void *to, const void __user *from, unsigned long n); - -static inline unsigned long __must_check -__copy_from_user(void *to, const void __user *from, unsigned long n) -{ - might_fault(); - return __copy_from_user_zeroing(to, from, n); -} - -static inline unsigned long __must_check -_copy_from_user(void *to, const void __user *from, unsigned long n) -{ - if (access_ok(VERIFY_READ, from, n)) - n = __copy_from_user(to, from, n); - else - memset(to, 0, n); - return n; -} - -extern void __compiletime_error("usercopy buffer size is too small") -__bad_copy_user(void); - -static inline void copy_user_overflow(int size, unsigned long count) -{ - WARN(1, "Buffer overflow detected (%d < %lu)!\n", size, count); -} - -static inline unsigned long __must_check copy_from_user(void *to, - const void __user *from, - unsigned long n) -{ - int sz = __compiletime_object_size(to); - - if (likely(sz == -1 || sz >= n)) - n = _copy_from_user(to, from, n); - else if (!__builtin_constant_p(n)) - copy_user_overflow(sz, n); - else - __bad_copy_user(); - - return n; -} +extern unsigned long __must_check +raw_copy_to_user(void __user *to, const void *from, unsigned long n); +extern unsigned long __must_check +raw_copy_from_user(void *to, const void __user *from, unsigned long n); +#define INLINE_COPY_FROM_USER +#define INLINE_COPY_TO_USER #ifdef __tilegx__ -/** - * __copy_in_user() - copy data within user space, with less checking. - * @to: Destination address, in user space. - * @from: Source address, in user space. - * @n: Number of bytes to copy. - * - * Context: User context only. This function may sleep if pagefaults are - * enabled. - * - * Copy data from user space to user space. Caller must check - * the specified blocks with access_ok() before calling this function. - * - * Returns number of bytes that could not be copied. - * On success, this will be zero. - */ -extern unsigned long __copy_in_user_inatomic( +extern unsigned long raw_copy_in_user( void __user *to, const void __user *from, unsigned long n); - -static inline unsigned long __must_check -__copy_in_user(void __user *to, const void __user *from, unsigned long n) -{ - might_fault(); - return __copy_in_user_inatomic(to, from, n); -} - -static inline unsigned long __must_check -copy_in_user(void __user *to, const void __user *from, unsigned long n) -{ - if (access_ok(VERIFY_WRITE, to, n) && access_ok(VERIFY_READ, from, n)) - n = __copy_in_user(to, from, n); - return n; -} #endif |