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authorArnd Bergmann2022-02-11 21:42:45 +0100
committerArnd Bergmann2022-02-25 09:36:06 +0100
commit967747bbc084b93b54e66f9047d342232314cd25 (patch)
tree816678a5afa21612d3d420c2cd6fc61abc64cda1 /arch/arm/lib
parente5ef21d139957b8d064fefb7db42d1525605dd98 (diff)
uaccess: remove CONFIG_SET_FS
There are no remaining callers of set_fs(), so CONFIG_SET_FS can be removed globally, along with the thread_info field and any references to it. This turns access_ok() into a cheaper check against TASK_SIZE_MAX. As CONFIG_SET_FS is now gone, drop all remaining references to set_fs()/get_fs(), mm_segment_t, user_addr_max() and uaccess_kernel(). Acked-by: Sam Ravnborg <sam@ravnborg.org> # for sparc32 changes Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Tested-by: Sergey Matyukevich <sergey.matyukevich@synopsys.com> # for arc changes Acked-by: Stafford Horne <shorne@gmail.com> # [openrisc, asm-generic] Acked-by: Dinh Nguyen <dinguyen@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/lib')
-rw-r--r--arch/arm/lib/uaccess_with_memcpy.c10
1 files changed, 0 insertions, 10 deletions
diff --git a/arch/arm/lib/uaccess_with_memcpy.c b/arch/arm/lib/uaccess_with_memcpy.c
index 106f83a5ea6d..c30b689bec2e 100644
--- a/arch/arm/lib/uaccess_with_memcpy.c
+++ b/arch/arm/lib/uaccess_with_memcpy.c
@@ -92,11 +92,6 @@ __copy_to_user_memcpy(void __user *to, const void *from, unsigned long n)
unsigned long ua_flags;
int atomic;
- if (uaccess_kernel()) {
- memcpy((void *)to, from, n);
- return 0;
- }
-
/* the mmap semaphore is taken only if not in an atomic context */
atomic = faulthandler_disabled();
@@ -165,11 +160,6 @@ __clear_user_memset(void __user *addr, unsigned long n)
{
unsigned long ua_flags;
- if (uaccess_kernel()) {
- memset((void *)addr, 0, n);
- return 0;
- }
-
mmap_read_lock(current->mm);
while (n) {
pte_t *pte;