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author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2014-01-24 12:51:27 +0100 |
---|---|---|
committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-02-21 08:50:15 +0100 |
commit | 211deca6bf413560b562d69748ebc4df5d80d65e (patch) | |
tree | f7975539a30a9460ae32aca62e16b4951a2412b0 /arch/s390/lib | |
parent | 4f41c2b4567dbfb7ff93e5c552b869e2865bcd9d (diff) | |
download | linux-211deca6bf413560b562d69748ebc4df5d80d65e.tar.bz2 |
s390/uaccess: consistent types
The types 'size_t' and 'unsigned long' have been used randomly for the
uaccess functions. This looks rather confusing.
So let's change all functions to use unsigned long instead and get rid
of size_t in order to have a consistent interface.
The only exception is strncpy_from_user() which uses 'long' since it
may return a signed value (-EFAULT).
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/lib')
-rw-r--r-- | arch/s390/lib/uaccess.h | 12 | ||||
-rw-r--r-- | arch/s390/lib/uaccess_mvcos.c | 39 | ||||
-rw-r--r-- | arch/s390/lib/uaccess_pt.c | 38 |
3 files changed, 45 insertions, 44 deletions
diff --git a/arch/s390/lib/uaccess.h b/arch/s390/lib/uaccess.h index e5b9c924b733..c7e0e81f4b4e 100644 --- a/arch/s390/lib/uaccess.h +++ b/arch/s390/lib/uaccess.h @@ -6,11 +6,11 @@ #ifndef __ARCH_S390_LIB_UACCESS_H #define __ARCH_S390_LIB_UACCESS_H -size_t copy_from_user_pt(void *to, const void __user *from, size_t n); -size_t copy_to_user_pt(void __user *to, const void *from, size_t n); -size_t copy_in_user_pt(void __user *to, const void __user *from, size_t n); -size_t clear_user_pt(void __user *to, size_t n); -size_t strnlen_user_pt(const char __user *src, size_t count); -size_t strncpy_from_user_pt(char *dst, const char __user *src, size_t count); +unsigned long copy_from_user_pt(void *to, const void __user *from, unsigned long n); +unsigned long copy_to_user_pt(void __user *to, const void *from, unsigned long n); +unsigned long copy_in_user_pt(void __user *to, const void __user *from, unsigned long n); +unsigned long clear_user_pt(void __user *to, unsigned long n); +unsigned long strnlen_user_pt(const char __user *src, unsigned long count); +long strncpy_from_user_pt(char *dst, const char __user *src, long count); #endif /* __ARCH_S390_LIB_UACCESS_H */ diff --git a/arch/s390/lib/uaccess_mvcos.c b/arch/s390/lib/uaccess_mvcos.c index 66f35e15db2d..8c01f3aaf95c 100644 --- a/arch/s390/lib/uaccess_mvcos.c +++ b/arch/s390/lib/uaccess_mvcos.c @@ -30,8 +30,8 @@ static struct static_key have_mvcos = STATIC_KEY_INIT_TRUE; -static inline size_t copy_from_user_mvcos(void *x, const void __user *ptr, - size_t size) +static inline unsigned long copy_from_user_mvcos(void *x, const void __user *ptr, + unsigned long size) { register unsigned long reg0 asm("0") = 0x81UL; unsigned long tmp1, tmp2; @@ -70,7 +70,7 @@ static inline size_t copy_from_user_mvcos(void *x, const void __user *ptr, return size; } -size_t __copy_from_user(void *to, const void __user *from, size_t n) +unsigned long __copy_from_user(void *to, const void __user *from, unsigned long n) { if (static_key_true(&have_mvcos)) return copy_from_user_mvcos(to, from, n); @@ -78,8 +78,8 @@ size_t __copy_from_user(void *to, const void __user *from, size_t n) } EXPORT_SYMBOL(__copy_from_user); -static inline size_t copy_to_user_mvcos(void __user *ptr, const void *x, - size_t size) +static inline unsigned long copy_to_user_mvcos(void __user *ptr, const void *x, + unsigned long size) { register unsigned long reg0 asm("0") = 0x810000UL; unsigned long tmp1, tmp2; @@ -108,7 +108,7 @@ static inline size_t copy_to_user_mvcos(void __user *ptr, const void *x, return size; } -size_t __copy_to_user(void __user *to, const void *from, size_t n) +unsigned long __copy_to_user(void __user *to, const void *from, unsigned long n) { if (static_key_true(&have_mvcos)) return copy_to_user_mvcos(to, from, n); @@ -116,8 +116,8 @@ size_t __copy_to_user(void __user *to, const void *from, size_t n) } EXPORT_SYMBOL(__copy_to_user); -static inline size_t copy_in_user_mvcos(void __user *to, const void __user *from, - size_t size) +static inline unsigned long copy_in_user_mvcos(void __user *to, const void __user *from, + unsigned long size) { register unsigned long reg0 asm("0") = 0x810081UL; unsigned long tmp1, tmp2; @@ -139,7 +139,7 @@ static inline size_t copy_in_user_mvcos(void __user *to, const void __user *from return size; } -size_t __copy_in_user(void __user *to, const void __user *from, size_t n) +unsigned long __copy_in_user(void __user *to, const void __user *from, unsigned long n) { if (static_key_true(&have_mvcos)) return copy_in_user_mvcos(to, from, n); @@ -147,7 +147,7 @@ size_t __copy_in_user(void __user *to, const void __user *from, size_t n) } EXPORT_SYMBOL(__copy_in_user); -static inline size_t clear_user_mvcos(void __user *to, size_t size) +static inline unsigned long clear_user_mvcos(void __user *to, unsigned long size) { register unsigned long reg0 asm("0") = 0x810000UL; unsigned long tmp1, tmp2; @@ -175,7 +175,7 @@ static inline size_t clear_user_mvcos(void __user *to, size_t size) return size; } -size_t __clear_user(void __user *to, size_t size) +unsigned long __clear_user(void __user *to, unsigned long size) { if (static_key_true(&have_mvcos)) return clear_user_mvcos(to, size); @@ -183,14 +183,15 @@ size_t __clear_user(void __user *to, size_t size) } EXPORT_SYMBOL(__clear_user); -static inline size_t strnlen_user_mvcos(const char __user *src, size_t count) +static inline unsigned long strnlen_user_mvcos(const char __user *src, + unsigned long count) { - size_t done, len, offset, len_str; + unsigned long done, len, offset, len_str; char buf[256]; done = 0; do { - offset = (size_t)src & ~PAGE_MASK; + offset = (unsigned long)src & ~PAGE_MASK; len = min(256UL, PAGE_SIZE - offset); len = min(count - done, len); if (copy_from_user_mvcos(buf, src, len)) @@ -202,7 +203,7 @@ static inline size_t strnlen_user_mvcos(const char __user *src, size_t count) return done + 1; } -size_t __strnlen_user(const char __user *src, size_t count) +unsigned long __strnlen_user(const char __user *src, unsigned long count) { if (static_key_true(&have_mvcos)) return strnlen_user_mvcos(src, count); @@ -210,16 +211,16 @@ size_t __strnlen_user(const char __user *src, size_t count) } EXPORT_SYMBOL(__strnlen_user); -static inline size_t strncpy_from_user_mvcos(char *dst, const char __user *src, - size_t count) +static inline long strncpy_from_user_mvcos(char *dst, const char __user *src, + long count) { unsigned long done, len, offset, len_str; - if (unlikely(!count)) + if (unlikely(count <= 0)) return 0; done = 0; do { - offset = (size_t)src & ~PAGE_MASK; + offset = (unsigned long)src & ~PAGE_MASK; len = min(count - done, PAGE_SIZE - offset); if (copy_from_user_mvcos(dst, src, len)) return -EFAULT; diff --git a/arch/s390/lib/uaccess_pt.c b/arch/s390/lib/uaccess_pt.c index b49c3a440a24..8d39760bae68 100644 --- a/arch/s390/lib/uaccess_pt.c +++ b/arch/s390/lib/uaccess_pt.c @@ -22,7 +22,7 @@ #define SLR "slgr" #endif -static size_t strnlen_kernel(const char __user *src, size_t count) +static unsigned long strnlen_kernel(const char __user *src, unsigned long count) { register unsigned long reg0 asm("0") = 0UL; unsigned long tmp1, tmp2; @@ -42,8 +42,8 @@ static size_t strnlen_kernel(const char __user *src, size_t count) return count; } -static size_t copy_in_kernel(void __user *to, const void __user *from, - size_t count) +static unsigned long copy_in_kernel(void __user *to, const void __user *from, + unsigned long count) { unsigned long tmp1; @@ -146,8 +146,8 @@ static unsigned long follow_table(struct mm_struct *mm, #endif /* CONFIG_64BIT */ -static __always_inline size_t __user_copy_pt(unsigned long uaddr, void *kptr, - size_t n, int write_user) +static inline unsigned long __user_copy_pt(unsigned long uaddr, void *kptr, + unsigned long n, int write_user) { struct mm_struct *mm = current->mm; unsigned long offset, done, size, kaddr; @@ -189,8 +189,7 @@ fault: * Do DAT for user address by page table walk, return kernel address. * This function needs to be called with current->mm->page_table_lock held. */ -static __always_inline unsigned long __dat_user_addr(unsigned long uaddr, - int write) +static inline unsigned long __dat_user_addr(unsigned long uaddr, int write) { struct mm_struct *mm = current->mm; unsigned long kaddr; @@ -211,9 +210,9 @@ fault: return 0; } -size_t copy_from_user_pt(void *to, const void __user *from, size_t n) +unsigned long copy_from_user_pt(void *to, const void __user *from, unsigned long n) { - size_t rc; + unsigned long rc; if (segment_eq(get_fs(), KERNEL_DS)) return copy_in_kernel((void __user *) to, from, n); @@ -223,17 +222,17 @@ size_t copy_from_user_pt(void *to, const void __user *from, size_t n) return rc; } -size_t copy_to_user_pt(void __user *to, const void *from, size_t n) +unsigned long copy_to_user_pt(void __user *to, const void *from, unsigned long n) { if (segment_eq(get_fs(), KERNEL_DS)) return copy_in_kernel(to, (void __user *) from, n); return __user_copy_pt((unsigned long) to, (void *) from, n, 1); } -size_t clear_user_pt(void __user *to, size_t n) +unsigned long clear_user_pt(void __user *to, unsigned long n) { void *zpage = (void *) empty_zero_page; - long done, size, ret; + unsigned long done, size, ret; done = 0; do { @@ -253,12 +252,12 @@ size_t clear_user_pt(void __user *to, size_t n) return 0; } -size_t strnlen_user_pt(const char __user *src, size_t count) +unsigned long strnlen_user_pt(const char __user *src, unsigned long count) { unsigned long uaddr = (unsigned long) src; struct mm_struct *mm = current->mm; unsigned long offset, done, len, kaddr; - size_t len_str; + unsigned long len_str; if (unlikely(!count)) return 0; @@ -289,15 +288,15 @@ fault: goto retry; } -size_t strncpy_from_user_pt(char *dst, const char __user *src, size_t count) +long strncpy_from_user_pt(char *dst, const char __user *src, long count) { - size_t done, len, offset, len_str; + unsigned long done, len, offset, len_str; - if (unlikely(!count)) + if (unlikely(count <= 0)) return 0; done = 0; do { - offset = (size_t)src & ~PAGE_MASK; + offset = (unsigned long)src & ~PAGE_MASK; len = min(count - done, PAGE_SIZE - offset); if (segment_eq(get_fs(), KERNEL_DS)) { if (copy_in_kernel((void __user *) dst, src, len)) @@ -314,7 +313,8 @@ size_t strncpy_from_user_pt(char *dst, const char __user *src, size_t count) return done; } -size_t copy_in_user_pt(void __user *to, const void __user *from, size_t n) +unsigned long copy_in_user_pt(void __user *to, const void __user *from, + unsigned long n) { struct mm_struct *mm = current->mm; unsigned long offset_max, uaddr, done, size, error_code; |