< Snip long thread about init segfaulting immediately at boot on 2.5.55 >
> I just dropped jffs2 from 2.5.52 into 2.5.55 and it works, too.
> Aha! This is the problem:
> - .mmap = generic_file_mmap,
> + .mmap = generic_file_readonly_mmap,
> If you reverese this change, 2.5.55-rmk1 behaves.
Er, yes. generic_file_readonly_mmap() silently removed the VM_MAYWRITE bit
from vma->vm_flags when init made a _PRIVATE_ writable mapping, apparently
on the basis that we have no writepage().
Then we return success anyway.
Then init segfaults when it touches something in that mapping.
/me blames akpm. :)
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This archive was generated by hypermail 2b29 : Thu Jan 23 2003 - 22:00:31 EST