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authorMichael Ellerman <michael@ellerman.id.au>2008-07-31 16:54:28 +1000
committerPaul Mackerras <paulus@samba.org>2008-08-20 09:50:21 +1000
commit7230ced4925b07c259a62b515d8278c6bb1ad98c (patch)
tree7d1afdc5dac4ccc3481a8a22b86d2bb2f548bd4d /arch/powerpc/kernel/ibmebus.c
parentd82bf490948eaf10023ff850d0b5c70e49e0ba76 (diff)
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powerpc: Fix /dev/oldmem interface for kdump
A change to __ioremap() broke reading /dev/oldmem because we're no longer able to ioremap pfn 0 (d177c207, "[PATCH] powerpc: IOMMU: don't ioremap null addresses"). We actually don't need to ioremap for anything that's part of the linear mapping, so just read it directly. Also make sure we're only reading one page or less at a time. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Sachin Sant <sachinp@in.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/ibmebus.c')
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