tree 3bf6f7b50160fae8dd9f2b08a6bc0541500b5c63
parent 6e5dc42b5add25c94ce0e95da87122f91b4bfdb3
author James Bottomley <jejb@parisc-linux.org> 1157830585 -0700
committer Matthew Wilcox <willy@parisc-linux.org> 1159966137 -0600

[PARISC] Allow nested interrupts

Our prior mode of operation didn't allow nested interrupts
because it makes the interrupt code much simpler.  However,
nested interrupts are better for latency.

This code uses the EIEM register to simulate level interrupts
and thus achieve nesting.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>