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kdump: arrange for paddr_vmcoreinfo_note() to return phys_addr_t

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On PAE systems (eg, ARM LPAE) the vmcore note may be located above 4GB
physical on 32-bit architectures, so we need a wider type than "unsigned
long" here.  Arrange for paddr_vmcoreinfo_note() to return a
phys_addr_t, thereby allowing it to be located above 4GB.

This makes no difference for kexec-tools, as they already assume a
64-bit type when reading from this file.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Russell King <[email protected]>
Reviewed-by: Pratyush Anand <[email protected]>
Acked-by: Baoquan He <[email protected]>
Cc: Keerthy <[email protected]>
Cc: Vitaly Andrianov <[email protected]>
Cc: Eric Biederman <[email protected]>
Cc: Dave Young <[email protected]>
Cc: Vivek Goyal <[email protected]>
Cc: Simon Horman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Russell King 2016-08-02 14:06:00 -07:00 • committed by Linus Torvalds
commit dae28018f5
4 changed files with 5 additions and 5 deletions
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4
kernel/ksysfs.c
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@ -128,8 +128,8 @@ KERNEL_ATTR_RW(kexec_crash_size);
static ssize_t vmcoreinfo_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sprintf(buf, "%lx %x\n",
paddr_vmcoreinfo_note(),
phys_addr_t vmcore_base = paddr_vmcoreinfo_note();
return sprintf(buf, "%pa %x\n", &vmcore_base,
(unsigned int)sizeof(vmcoreinfo_note));
}
KERNEL_ATTR_RO(vmcoreinfo);