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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2016-08-02 14:06:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-02 19:35:27 -0400 |
| commit | dae28018f56645b61f5beb84d5831346d3c5e457 (patch) | |
| tree | 3d472ba7f21e4d0c6d6283605052b716af1794a2 /kernel | |
| parent | 465d377701dfe6a08a9f361a3fd926dea7f89c74 (diff) | |
| download | linux-dae28018f56645b61f5beb84d5831346d3c5e457.tar.gz linux-dae28018f56645b61f5beb84d5831346d3c5e457.tar.bz2 linux-dae28018f56645b61f5beb84d5831346d3c5e457.zip | |
kdump: arrange for paddr_vmcoreinfo_note() to return phys_addr_t
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/E1b8koK-0004HS-K9@rmk-PC.armlinux.org.uk
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: Pratyush Anand <panand@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: Keerthy <j-keerthy@ti.com>
Cc: Vitaly Andrianov <vitalya@ti.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Simon Horman <horms@verge.net.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/kexec_core.c | 2 | ||||
| -rw-r--r-- | kernel/ksysfs.c | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c index 5a83b2a9d584..dab03f17be25 100644 --- a/kernel/kexec_core.c +++ b/kernel/kexec_core.c @@ -1372,7 +1372,7 @@ void vmcoreinfo_append_str(const char *fmt, ...) void __weak arch_crash_save_vmcoreinfo(void) {} -unsigned long __weak paddr_vmcoreinfo_note(void) +phys_addr_t __weak paddr_vmcoreinfo_note(void) { return __pa((unsigned long)(char *)&vmcoreinfo_note); } diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c index 152da4a48867..9f1920d2d0c6 100644 --- a/kernel/ksysfs.c +++ b/kernel/ksysfs.c @@ -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); |