add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/hexagon/kernel/signal.c
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..
@@ -1,21 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Signal support for Hexagon processor
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  *
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  * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
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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 and
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- * only version 2 as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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- * 02110-1301, USA.
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  */
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 #include <linux/linkage.h>
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@@ -115,7 +102,7 @@
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 	frame = get_sigframe(ksig, regs, sizeof(struct rt_sigframe));
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-	if (!access_ok(VERIFY_WRITE, frame, sizeof(struct rt_sigframe)))
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+	if (!access_ok(frame, sizeof(struct rt_sigframe)))
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 		return -EFAULT;
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 	if (copy_siginfo_to_user(&frame->info, &ksig->info))
..
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@@ -168,7 +155,7 @@
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 				regs->r00 = -EINTR;
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 				break;
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 			}
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-			/* Fall through */
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+			fallthrough;
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 		case -ERESTARTNOINTR:
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 			regs->r06 = regs->syscall_nr;
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 			pt_set_elr(regs, pt_elr(regs) - 4);
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@@ -244,7 +231,7 @@
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 	current->restart_block.fn = do_no_restart_syscall;
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 	frame = (struct rt_sigframe __user *)pt_psp(regs);
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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(&blocked, &frame->uc.uc_sigmask, sizeof(blocked)))
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 		goto badframe;
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@@ -265,6 +252,6 @@
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 	return regs->r00;
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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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 }