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https://github.com/torvalds/linux
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10fdf838e5
On several arches, virt_to_phys() is in io.h
Build fails without it:
CC lib/test_debug_virtual.o
lib/test_debug_virtual.c: In function 'test_debug_virtual_init':
lib/test_debug_virtual.c:26:7: error: implicit declaration of function 'virt_to_phys' [-Werror=implicit-function-declaration]
pa = virt_to_phys(va);
^
Fixes: e4dace3615 ("lib: add test module for CONFIG_DEBUG_VIRTUAL")
CC: stable@vger.kernel.org
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
50 lines
940 B
C
50 lines
940 B
C
#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/export.h>
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#include <linux/mm.h>
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#include <linux/vmalloc.h>
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#include <linux/slab.h>
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#include <linux/sizes.h>
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#include <linux/io.h>
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#include <asm/page.h>
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#ifdef CONFIG_MIPS
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#include <asm/bootinfo.h>
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#endif
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struct foo {
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unsigned int bar;
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};
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static struct foo *foo;
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static int __init test_debug_virtual_init(void)
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{
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phys_addr_t pa;
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void *va;
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va = (void *)VMALLOC_START;
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pa = virt_to_phys(va);
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pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va);
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foo = kzalloc(sizeof(*foo), GFP_KERNEL);
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if (!foo)
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return -ENOMEM;
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pa = virt_to_phys(foo);
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va = foo;
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pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va);
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return 0;
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}
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module_init(test_debug_virtual_init);
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static void __exit test_debug_virtual_exit(void)
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{
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kfree(foo);
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}
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module_exit(test_debug_virtual_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Test module for CONFIG_DEBUG_VIRTUAL");
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