diff options
Diffstat (limited to 'arch/arm64/kernel/process.c')
| -rw-r--r-- | arch/arm64/kernel/process.c | 21 |
1 files changed, 1 insertions, 20 deletions
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 496e2e33bbec..129fb3f8c322 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -46,7 +46,6 @@ #include <linux/notifier.h> #include <trace/events/power.h> -#include <asm/alternative.h> #include <asm/compat.h> #include <asm/cacheflush.h> #include <asm/fpsimd.h> @@ -351,9 +350,6 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start, } else { memset(childregs, 0, sizeof(struct pt_regs)); childregs->pstate = PSR_MODE_EL1h; - if (IS_ENABLED(CONFIG_ARM64_UAO) && - cpus_have_cap(ARM64_HAS_UAO)) - childregs->pstate |= PSR_UAO_BIT; p->thread.cpu_context.x19 = stack_start; p->thread.cpu_context.x20 = stk_sz; } @@ -382,17 +378,6 @@ static void tls_thread_switch(struct task_struct *next) : : "r" (tpidr), "r" (tpidrro)); } -/* Restore the UAO state depending on next's addr_limit */ -static void uao_thread_switch(struct task_struct *next) -{ - if (IS_ENABLED(CONFIG_ARM64_UAO)) { - if (task_thread_info(next)->addr_limit == KERNEL_DS) - asm(ALTERNATIVE("nop", SET_PSTATE_UAO(1), ARM64_HAS_UAO)); - else - asm(ALTERNATIVE("nop", SET_PSTATE_UAO(0), ARM64_HAS_UAO)); - } -} - /* * Thread switching. */ @@ -405,7 +390,6 @@ struct task_struct *__switch_to(struct task_struct *prev, tls_thread_switch(next); hw_breakpoint_thread_switch(next); contextidr_thread_switch(next); - uao_thread_switch(next); /* * Complete any pending TLB or cache maintenance on this CPU in case @@ -430,14 +414,11 @@ unsigned long get_wchan(struct task_struct *p) frame.fp = thread_saved_fp(p); frame.sp = thread_saved_sp(p); frame.pc = thread_saved_pc(p); -#ifdef CONFIG_FUNCTION_GRAPH_TRACER - frame.graph = p->curr_ret_stack; -#endif stack_page = (unsigned long)task_stack_page(p); do { if (frame.sp < stack_page || frame.sp >= stack_page + THREAD_SIZE || - unwind_frame(p, &frame)) + unwind_frame(&frame)) return 0; if (!in_sched_functions(frame.pc)) return frame.pc; |