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authorRussell King <rmk+kernel@arm.linux.org.uk>2009-12-18 16:24:34 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-01-20 13:48:30 +0000
commit56dd47098abe1fdde598a8d8b7c04d775506f456 (patch)
tree5eda8a531087c9c068702aa426db8479a77147f8 /drivers/ssb/pcmcia.c
parentf8a85f1164a33e3eb5b421b137ced793ed53ee33 (diff)
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ARM: make_coherent: fix problems with highpte, part 1
update_mmu_cache() is called with a page table already mapped. We call make_coherent(), which then calls adjust_pte() which wants to map other page tables. This causes kmap_atomic() to BUG() because the slot its trying to use is already taken. Since do_adjust_pte() modifies the page tables, we are also missing any form of locking, so we're risking corrupting the page tables. Fix this by using pte_offset_map_nested(), and taking the pte page table lock around do_adjust_pte(). Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/ssb/pcmcia.c')
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