riscv: remove useless pc check in stacktrace handling

Checking for pc to be a kernel text address at this location is useless
since pc == handle_exception. Remove this check.

[ alex: Fix merge conflict ]

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20240830084934.3690037-1-cleger@rivosinc.com
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>

Author: clementleger

arch/riscv/kernel/stacktrace.c

@@ -74,7 +74,7 @@ void notrace walk_stackframe(struct task_struct *task, struct pt_regs *regs,
 						   &frame->ra);
 			if (pc >= (unsigned long)handle_exception &&
 			    pc < (unsigned long)&ret_from_exception_end) {
-				if (unlikely(!__kernel_text_address(pc) || !fn(arg, pc)))
+				if (unlikely(!fn(arg, pc)))
 					break;
 
 				pc = ((struct pt_regs *)sp)->epc;