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| author | David S. Miller <davem@davemloft.net> | 2008-02-26 17:30:02 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-02-26 17:30:02 -0800 |
| commit | 622eaec613130e6ea78f2a5d5070e3278b21cd8f (patch) | |
| tree | f1d9e4d5d9b1b05a99b9a29085a471bea474d40a /arch | |
| parent | 896aef430e5afb56b5f7b1d959226b8a6a08108a (diff) | |
| download | op-kernel-dev-622eaec613130e6ea78f2a5d5070e3278b21cd8f.zip op-kernel-dev-622eaec613130e6ea78f2a5d5070e3278b21cd8f.tar.gz | |
[SPARC64]: Loosen checks in exception table handling.
Some parts of the kernel now do things like do *_user() accesses while
set_fs(KERNEL_DS) that fault on purpose.
See, for example, the code added by changeset
a0c1e9073ef7428a14309cba010633a6cd6719ea ("futex: runtime enable pi
and robust functionality").
That trips up the ASI sanity checking we make in do_kernel_fault().
Just remove it for now. Maybe we can add it back later with an added
conditional which looks at the current get_fs() value.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sparc64/mm/fault.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/arch/sparc64/mm/fault.c b/arch/sparc64/mm/fault.c index e2027f2..9183633 100644 --- a/arch/sparc64/mm/fault.c +++ b/arch/sparc64/mm/fault.c @@ -244,16 +244,8 @@ static void do_kernel_fault(struct pt_regs *regs, int si_code, int fault_code, if (regs->tstate & TSTATE_PRIV) { const struct exception_table_entry *entry; - if (asi == ASI_P && (insn & 0xc0800000) == 0xc0800000) { - if (insn & 0x2000) - asi = (regs->tstate >> 24); - else - asi = (insn >> 5); - } - - /* Look in asi.h: All _S asis have LS bit set */ - if ((asi & 0x1) && - (entry = search_exception_tables(regs->tpc))) { + entry = search_exception_tables(regs->tpc); + if (entry) { regs->tpc = entry->fixup; regs->tnpc = regs->tpc + 4; return; |
