add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/microblaze/kernel/signal.c
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@@ -35,8 +35,6 @@
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 #include <asm/entry.h>
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 #include <asm/ucontext.h>
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 #include <linux/uaccess.h>
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-#include <asm/pgtable.h>
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-#include <asm/pgalloc.h>
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 #include <linux/syscalls.h>
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 #include <asm/cacheflush.h>
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 #include <asm/syscalls.h>
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@@ -91,7 +89,7 @@
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 	/* Always make any pending restarted system calls return -EINTR */
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 	current->restart_block.fn = do_no_restart_syscall;
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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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@@ -108,7 +106,7 @@
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 	return rval;
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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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@@ -166,7 +164,7 @@
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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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 	if (ksig->ka.sa.sa_flags & SA_SIGINFO)
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@@ -195,9 +193,7 @@
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 	address = ((unsigned long)frame->tramp);
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 #ifdef CONFIG_MMU
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-	pmdp = pmd_offset(pud_offset(
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-			pgd_offset(current->mm, address),
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-					address), address);
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+	pmdp = pmd_off(current->mm, address);
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 	preempt_disable();
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 	ptep = pte_offset_map(pmdp, address);
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@@ -253,7 +249,7 @@
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 			regs->r3 = -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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 		/* offset of 4 bytes to re-execute trap (brki) instruction */
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@@ -317,9 +313,10 @@
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 asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall)
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 {
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-	if (test_thread_flag(TIF_SIGPENDING))
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+	if (test_thread_flag(TIF_SIGPENDING) ||
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+	    test_thread_flag(TIF_NOTIFY_SIGNAL))
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 		do_signal(regs, in_syscall);
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-	if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME))
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+	if (test_thread_flag(TIF_NOTIFY_RESUME))
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 		tracehook_notify_resume(regs);
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 }