Messages in this thread | | | Date | Tue, 10 Mar 2015 17:17:51 +0000 | From | Catalin Marinas <> | Subject | Re: [PATCH] n_tty: use kmalloc() instead of vmalloc() to avoid crash on armada-xp |
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On Tue, Mar 10, 2015 at 07:54:22PM +0300, Stas Sergeev wrote: > Hello, the patch below is needed for a successful boot on armada-xp. > > -=-=-=-=-=-=-=-=-=# Don't remove this line #=-=-=-=-=-=-=-=-=- > This fixes the following crash at boot: > > Unhandled fault: external abort on non-linefetch (0x808) at 0xf00ca018 > Internal error: : 808 [#1] SMP ARM
I think you have some other problems. That's an external abort, which means that the original vmalloc'ed memory was not mapping RAM but some empty physical address space.
That's unless strex hits device memory and not having an exclusive monitor causes such external abort. But vmalloc() memory is Normal Cacheable. Some pointer could go wrong and it hits ioremap'ed memory which is in the same range as vmalloc'ed memory.
-- Catalin
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