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| author | David S. Miller <davem@davemloft.net> | 2013-02-20 12:38:40 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-02-20 13:34:41 -0800 |
| commit | 76968ad2eac6456270353de168b21f04f4b3d1d3 (patch) | |
| tree | b5181645596ff9cce2e250bdf5de10948868a01e /arch/sparc/kernel/leon_smp.c | |
| parent | 0fbebed682ff2788dee58e8d7f7dda46e33aa10b (diff) | |
| download | blackbird-op-linux-76968ad2eac6456270353de168b21f04f4b3d1d3.tar.gz blackbird-op-linux-76968ad2eac6456270353de168b21f04f4b3d1d3.zip | |
sparc64: Fix huge PMD to PTE translation for sun4u in TLB miss handler.
When we set the sun4u version of the PTE execute bit, it's:
or REG, _PAGE_EXEC_4U, REG
_PAGE_EXEC_4U is 0x1000, unfortunately the immedate field of the
'or' instruction is a signed 13-bit value. So the above actually
assembles into:
or REG, -4096, REG
completely corrupting the final PTE value.
Set it with a:
sethi %hi(_PAGE_EXEC_4U), TMP
or REG, TMP, REG
sequence instead.
This fixes "git gc" crashes on sun4u machines.
Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/leon_smp.c')
0 files changed, 0 insertions, 0 deletions
