diff options
Diffstat (limited to 'arch/arm64/mm/fault.c')
| -rw-r--r-- | arch/arm64/mm/fault.c | 34 |
1 files changed, 1 insertions, 33 deletions
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index 35d75c60e2b8..2e339f0bd958 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -564,7 +564,7 @@ retry: mmap_read_lock(mm); } else { /* - * The above down_read_trylock() might have succeeded in which + * The above mmap_read_trylock() might have succeeded in which * case, we'll have missed the might_sleep() from down_read(). */ might_sleep(); @@ -875,44 +875,12 @@ static void debug_exception_exit(struct pt_regs *regs) } NOKPROBE_SYMBOL(debug_exception_exit); -#ifdef CONFIG_ARM64_ERRATUM_1463225 -DECLARE_PER_CPU(int, __in_cortex_a76_erratum_1463225_wa); - -static int cortex_a76_erratum_1463225_debug_handler(struct pt_regs *regs) -{ - if (user_mode(regs)) - return 0; - - if (!__this_cpu_read(__in_cortex_a76_erratum_1463225_wa)) - return 0; - - /* - * We've taken a dummy step exception from the kernel to ensure - * that interrupts are re-enabled on the syscall path. Return back - * to cortex_a76_erratum_1463225_svc_handler() with debug exceptions - * masked so that we can safely restore the mdscr and get on with - * handling the syscall. - */ - regs->pstate |= PSR_D_BIT; - return 1; -} -#else -static int cortex_a76_erratum_1463225_debug_handler(struct pt_regs *regs) -{ - return 0; -} -#endif /* CONFIG_ARM64_ERRATUM_1463225 */ -NOKPROBE_SYMBOL(cortex_a76_erratum_1463225_debug_handler); - void do_debug_exception(unsigned long addr_if_watchpoint, unsigned int esr, struct pt_regs *regs) { const struct fault_info *inf = esr_to_debug_fault_info(esr); unsigned long pc = instruction_pointer(regs); - if (cortex_a76_erratum_1463225_debug_handler(regs)) - return; - debug_exception_enter(regs); if (user_mode(regs) && !is_ttbr0_addr(pc)) |