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Revision 812ad49d88b51fab551acb3c2d9c7d054bc69423 authored by Linus Torvalds on 04 October 2019, 20:02:47 UTC, committed by Linus Torvalds on 04 October 2019, 20:02:47 UTC 
Merge tag 'riscv/for-v5.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
 
Pull RISC-V fixes from Paul Walmsley:

 - Ensure that exclusive-load reservations are terminated after system
   call or exception handling. This primarily affects QEMU, which does
   not expire load reservations.

 - Fix an issue primarily affecting RV32 platforms that can cause the DT
   header to be corrupted, causing boot failures.

* tag 'riscv/for-v5.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Fix memblock reservation for device tree blob
  RISC-V: Clear load reservations while restoring hart contexts
2 parent s a4ad51e + 922b037
Raw File
test_debug_virtual.c 
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/export.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/sizes.h>
#include <linux/io.h>

#include <asm/page.h>
#ifdef CONFIG_MIPS
#include <asm/bootinfo.h>
#endif

struct foo {
	unsigned int bar;
};

static struct foo *foo;

static int __init test_debug_virtual_init(void)
{
	phys_addr_t pa;
	void *va;

	va = (void *)VMALLOC_START;
	pa = virt_to_phys(va);

	pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va);

	foo = kzalloc(sizeof(*foo), GFP_KERNEL);
	if (!foo)
		return -ENOMEM;

	pa = virt_to_phys(foo);
	va = foo;
	pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va);

	return 0;
}
module_init(test_debug_virtual_init);

static void __exit test_debug_virtual_exit(void)
{
	kfree(foo);
}
module_exit(test_debug_virtual_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Test module for CONFIG_DEBUG_VIRTUAL");
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