add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/c6x/kernel/signal.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  *  Port on Texas Instruments TMS320C6x architecture
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  *
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@@ -5,10 +6,6 @@
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  *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
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  *
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  *  Updated for 2.6.34: Mark Salter <msalter@redhat.com>
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- *
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- *  This program is free software; you can redistribute it and/or modify
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- *  it under the terms of the GNU General Public License version 2 as
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- *  published by the Free Software Foundation.
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  */
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 #include <linux/kernel.h>
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@@ -16,6 +13,7 @@
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 #include <linux/syscalls.h>
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 #include <linux/tracehook.h>
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15
 
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+#include <asm/asm-offsets.h>
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 #include <asm/ucontext.h>
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 #include <asm/cacheflush.h>
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@@ -80,7 +78,7 @@
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 	frame = (struct rt_sigframe __user *) ((unsigned long) regs->sp + 8);
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-	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
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+	if (!access_ok(frame, sizeof(*frame)))
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 		goto badframe;
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 	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
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 		goto badframe;
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@@ -93,7 +91,7 @@
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 	return regs->a4;
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 badframe:
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-	force_sig(SIGSEGV, current);
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+	force_sig(SIGSEGV);
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 	return 0;
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 }
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@@ -149,7 +147,7 @@
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 	frame = get_sigframe(ksig, regs, sizeof(*frame));
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-	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
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+	if (!access_ok(frame, sizeof(*frame)))
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 		return -EFAULT;
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 	err |= __put_user(&frame->info, &frame->pinfo);
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@@ -223,7 +221,7 @@
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 			regs->a4 = -EINTR;
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 			break;
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 		}
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-	/* fallthrough */
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+		fallthrough;
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 	case -ERESTARTNOINTR:
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 do_restart:
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 		regs->a4 = regs->orig_a4;
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@@ -255,7 +253,7 @@
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 				break;
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 			}
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-			/* fallthrough */
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+			fallthrough;
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 		case -ERESTARTNOINTR:
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 			regs->a4 = regs->orig_a4;
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 			regs->pc -= 4;
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@@ -316,11 +314,9 @@
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 				 int syscall)
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 {
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 	/* deal with pending signal delivery */
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-	if (thread_info_flags & (1 << TIF_SIGPENDING))
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+	if (thread_info_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL))
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 		do_signal(regs, syscall);
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-	if (thread_info_flags & (1 << TIF_NOTIFY_RESUME)) {
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-		clear_thread_flag(TIF_NOTIFY_RESUME);
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+	if (thread_info_flags & (1 << TIF_NOTIFY_RESUME))
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 		tracehook_notify_resume(regs);
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-	}
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 }