mk-rootfs.sh

hc

2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376

 kernel/arch/x86/mm/testmmiotrace.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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  * Written by Pekka Paalanen, 2008-2009 <pq@iki.fi>
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  */
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@@ -7,6 +8,7 @@
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 #include <linux/module.h>
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 #include <linux/io.h>
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 #include <linux/mmiotrace.h>
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+#include <linux/security.h>
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 static unsigned long mmio_address;
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 module_param_hw(mmio_address, ulong, iomem, 0);
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@@ -77,7 +79,7 @@
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 static void do_test(unsigned long size)
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 {
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-	void __iomem *p = ioremap_nocache(mmio_address, size);
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+	void __iomem *p = ioremap(mmio_address, size);
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 	if (!p) {
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 		pr_err("could not ioremap, aborting.\n");
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 		return;
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@@ -102,7 +104,7 @@
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 	int i;
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 	for (i = 0; i < 10; ++i) {
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-		p = ioremap_nocache(mmio_address, PAGE_SIZE);
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+		p = ioremap(mmio_address, PAGE_SIZE);
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 		if (p)
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 			iounmap(p);
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 	}
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@@ -114,6 +116,10 @@
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 static int __init init(void)
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 {
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 	unsigned long size = (read_far) ? (8 << 20) : (16 << 10);
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+	int ret = security_locked_down(LOCKDOWN_MMIOTRACE);
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+
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+	if (ret)
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+		return ret;
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 	if (mmio_address == 0) {
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 		pr_err("you have to use the module argument mmio_address.\n");
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@@ -121,9 +127,9 @@
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 		return -ENXIO;
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 	}
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-	pr_warning("WARNING: mapping %lu kB @ 0x%08lx in PCI address space, "
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-		   "and writing 16 kB of rubbish in there.\n",
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-		   size >> 10, mmio_address);
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+	pr_warn("WARNING: mapping %lu kB @ 0x%08lx in PCI address space, "
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+		"and writing 16 kB of rubbish in there.\n",
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+		size >> 10, mmio_address);
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 	do_test(size);
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 	do_test_bulk_ioremapping();
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 	pr_info("All done.\n");