kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/arch/parisc/kernel/sys_parisc.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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2
 
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 /*
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  *    PARISC specific syscalls
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..
@@ -5,22 +6,7 @@
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  *    Copyright (C) 1999-2003 Matthew Wilcox <willy at parisc-linux.org>
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  *    Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org>
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  *    Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org>
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- *    Copyright (C) 1999-2014 Helge Deller <deller@gmx.de>
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- *
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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 as published by
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- *    the Free Software Foundation; either version 2 of the License, or
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- *    (at your option) any later version.
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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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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+ *    Copyright (C) 1999-2020 Helge Deller <deller@gmx.de>
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  */
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11
 
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 #include <linux/uaccess.h>
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@@ -37,6 +23,7 @@
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 #include <linux/utsname.h>
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 #include <linux/personality.h>
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 #include <linux/random.h>
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+#include <linux/compat.h>
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27
 
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 /* we construct an artificial offset for the mapping based on the physical
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  * address of the kernel mapping variable */
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@@ -86,7 +73,8 @@
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 		stack_base = STACK_SIZE_MAX;
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 	/* Add space for stack randomization. */
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-	stack_base += (STACK_RND_MASK << PAGE_SHIFT);
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+	if (current->flags & PF_RANDOMIZE)
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+		stack_base += (STACK_RND_MASK << PAGE_SHIFT);
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 	return PAGE_ALIGN(STACK_TOP - stack_base);
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 }
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@@ -386,3 +374,73 @@
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 	return err;
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 }
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+
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+/*
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+ * Up to kernel v5.9 we defined O_NONBLOCK as 000200004,
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+ * since then O_NONBLOCK is defined as 000200000.
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+ *
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+ * The following wrapper functions mask out the old
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+ * O_NDELAY bit from calls which use O_NONBLOCK.
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+ *
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+ * XXX: Remove those in year 2022 (or later)?
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+ */
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+
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+#define O_NONBLOCK_OLD		000200004
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+#define O_NONBLOCK_MASK_OUT	(O_NONBLOCK_OLD & ~O_NONBLOCK)
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+
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+static int FIX_O_NONBLOCK(int flags)
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+{
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+	if (flags & O_NONBLOCK_MASK_OUT) {
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+		struct task_struct *tsk = current;
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+		pr_warn_once("%s(%d) uses a deprecated O_NONBLOCK value.\n",
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+			tsk->comm, tsk->pid);
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+	}
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+	return flags & ~O_NONBLOCK_MASK_OUT;
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+}
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+
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+asmlinkage long parisc_timerfd_create(int clockid, int flags)
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+{
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+	flags = FIX_O_NONBLOCK(flags);
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+	return sys_timerfd_create(clockid, flags);
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+}
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+
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+asmlinkage long parisc_signalfd4(int ufd, sigset_t __user *user_mask,
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+	size_t sizemask, int flags)
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+{
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+	flags = FIX_O_NONBLOCK(flags);
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+	return sys_signalfd4(ufd, user_mask, sizemask, flags);
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+}
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+
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+#ifdef CONFIG_COMPAT
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+asmlinkage long parisc_compat_signalfd4(int ufd,
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+	compat_sigset_t __user *user_mask,
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+	compat_size_t sizemask, int flags)
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+{
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+	flags = FIX_O_NONBLOCK(flags);
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+	return compat_sys_signalfd4(ufd, user_mask, sizemask, flags);
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+}
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+#endif
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+
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+asmlinkage long parisc_eventfd2(unsigned int count, int flags)
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+{
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+	flags = FIX_O_NONBLOCK(flags);
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+	return sys_eventfd2(count, flags);
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+}
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+
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+asmlinkage long parisc_userfaultfd(int flags)
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+{
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+	flags = FIX_O_NONBLOCK(flags);
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+	return sys_userfaultfd(flags);
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+}
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+
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+asmlinkage long parisc_pipe2(int __user *fildes, int flags)
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+{
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+	flags = FIX_O_NONBLOCK(flags);
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+	return sys_pipe2(fildes, flags);
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+}
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+
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+asmlinkage long parisc_inotify_init1(int flags)
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+{
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+	flags = FIX_O_NONBLOCK(flags);
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+	return sys_inotify_init1(flags);
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+}