Update Linux to v5.10.109

Sourced from [1]

[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz

Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index f6efabc..50d0515 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -52,7 +52,7 @@
 	/* Matches struct ucontext from its uc_mcontext field onwards */
 	struct sigcontext sf_sc;
 	sigset_t sf_mask;
-	unsigned long long sf_extcontext[0];
+	unsigned long long sf_extcontext[];
 };
 
 struct rt_sigframe {
@@ -545,6 +545,12 @@
 	return err ?: protected_restore_fp_context(sc);
 }
 
+#ifdef CONFIG_WAR_ICACHE_REFILLS
+#define SIGMASK		~(cpu_icache_line_size()-1)
+#else
+#define SIGMASK		ALMASK
+#endif
+
 void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs,
 			  size_t frame_size)
 {
@@ -565,7 +571,7 @@
 
 	sp = sigsp(sp, ksig);
 
-	return (void __user *)((sp - frame_size) & (ICACHE_REFILLS_WORKAROUND_WAR ? ~(cpu_icache_line_size()-1) : ALMASK));
+	return (void __user *)((sp - frame_size) & SIGMASK);
 }
 
 /*
@@ -824,7 +830,7 @@
 				regs->regs[2] = EINTR;
 				break;
 			}
-		/* fallthrough */
+			fallthrough;
 		case ERESTARTNOINTR:
 			regs->regs[7] = regs->regs[26];
 			regs->regs[2] = regs->regs[0];
@@ -901,7 +907,6 @@
 		do_signal(regs);
 
 	if (thread_info_flags & _TIF_NOTIFY_RESUME) {
-		clear_thread_flag(TIF_NOTIFY_RESUME);
 		tracehook_notify_resume(regs);
 		rseq_handle_notify_resume(NULL, regs);
 	}