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| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-03-21 02:08:07 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-03-28 22:43:25 +0200 |
| commit | db68ce10c4f0a27c1ff9fa0e789e5c41f8c4ea63 (patch) | |
| tree | 77eda1d247853a2d414e0047c620b3c72bb11a1a /arch/um | |
| parent | add asm-generic/extable.h (diff) | |
| download | linux-db68ce10c4f0a27c1ff9fa0e789e5c41f8c4ea63.tar.xz linux-db68ce10c4f0a27c1ff9fa0e789e5c41f8c4ea63.zip | |
new helper: uaccess_kernel()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/include/asm/uaccess.h | 2 | ||||
| -rw-r--r-- | arch/um/kernel/skas/uaccess.c | 10 |
2 files changed, 6 insertions, 6 deletions
diff --git a/arch/um/include/asm/uaccess.h b/arch/um/include/asm/uaccess.h index 076bdcb0c2ad..e992bb57da5a 100644 --- a/arch/um/include/asm/uaccess.h +++ b/arch/um/include/asm/uaccess.h @@ -45,7 +45,7 @@ static inline int __access_ok(unsigned long addr, unsigned long size) return __addr_range_nowrap(addr, size) && (__under_task_size(addr, size) || __access_ok_vsyscall(addr, size) || - segment_eq(get_fs(), KERNEL_DS)); + uaccess_kernel()); } #endif diff --git a/arch/um/kernel/skas/uaccess.c b/arch/um/kernel/skas/uaccess.c index 85ac8adb069b..22c9f79db8e6 100644 --- a/arch/um/kernel/skas/uaccess.c +++ b/arch/um/kernel/skas/uaccess.c @@ -141,7 +141,7 @@ static int copy_chunk_from_user(unsigned long from, int len, void *arg) long __copy_from_user(void *to, const void __user *from, unsigned long n) { - if (segment_eq(get_fs(), KERNEL_DS)) { + if (uaccess_kernel()) { memcpy(to, (__force void*)from, n); return 0; } @@ -161,7 +161,7 @@ static int copy_chunk_to_user(unsigned long to, int len, void *arg) long __copy_to_user(void __user *to, const void *from, unsigned long n) { - if (segment_eq(get_fs(), KERNEL_DS)) { + if (uaccess_kernel()) { memcpy((__force void *) to, from, n); return 0; } @@ -189,7 +189,7 @@ long __strncpy_from_user(char *dst, const char __user *src, long count) long n; char *ptr = dst; - if (segment_eq(get_fs(), KERNEL_DS)) { + if (uaccess_kernel()) { strncpy(dst, (__force void *) src, count); return strnlen(dst, count); } @@ -210,7 +210,7 @@ static int clear_chunk(unsigned long addr, int len, void *unused) unsigned long __clear_user(void __user *mem, unsigned long len) { - if (segment_eq(get_fs(), KERNEL_DS)) { + if (uaccess_kernel()) { memset((__force void*)mem, 0, len); return 0; } @@ -235,7 +235,7 @@ long __strnlen_user(const void __user *str, long len) { int count = 0, n; - if (segment_eq(get_fs(), KERNEL_DS)) + if (uaccess_kernel()) return strnlen((__force char*)str, len) + 1; n = buffer_op((unsigned long) str, len, 0, strnlen_chunk, &count); |