| commit | d344a53f2e264ea07c950691c1451a4ff355694b | |
| author | Alan Cox <alan@redhat.com> | |
| Sun, 12 Oct 2008 19:40:08 +0000 (12 19:40 +0000) | ||
| committer | Greg Kroah-Hartman <gregkh@suse.de> | |
| Sat, 18 Oct 2008 17:49:12 +0000 (18 10:49 -0700) | ||
| tree | 65fe727044a45f1c95ddd170a0a2703eb104a7f1 | treesnapshot (tar.gz zip) |
| parent | 432283d2c4e674181b892d77d9ac757b0f9899ea | commitdiff |
x86, early_ioremap: fix fencepost error
commit c613ec1a7ff3714da11c7c48a13bab03beb5c376 upstream
The x86 implementation of early_ioremap has an off by one error. If we get
an object which ends on the first byte of a page we undermap by one page and
this causes a crash on boot with the ASUS P5QL whose DMI table happens to fit
this alignment.
The size computation is currently
last_addr = phys_addr + size - 1;
npages = (PAGE_ALIGN(last_addr) - phys_addr)
(Consider a request for 1 byte at alignment 0...)
Closes #11693
Debugging work by Ian Campbell/Felix Geyer
Signed-off-by: Alan Cox <alan@rehat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
commit c613ec1a7ff3714da11c7c48a13bab03beb5c376 upstream
The x86 implementation of early_ioremap has an off by one error. If we get
an object which ends on the first byte of a page we undermap by one page and
this causes a crash on boot with the ASUS P5QL whose DMI table happens to fit
this alignment.
The size computation is currently
last_addr = phys_addr + size - 1;
npages = (PAGE_ALIGN(last_addr) - phys_addr)
(Consider a request for 1 byte at alignment 0...)
Closes #11693
Debugging work by Ian Campbell/Felix Geyer
Signed-off-by: Alan Cox <alan@rehat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| arch/x86/mm/ioremap.c | diffblobblamehistory |