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| author | Thomas Gleixner <tglx@linutronix.de> | 2017-04-20 16:05:13 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-04-20 16:05:13 +0200 |
| commit | 7a258ff04f9d5fe549fed6d03931a0236587047e (patch) | |
| tree | 6b164332c2a3983d972cc4dc47af3fce6cc5dc32 /arch/parisc/mm/fault.c | |
| parent | 382bd4de61827dbaaf5fb4fb7b1f4be4a86505e7 (diff) | |
| parent | f61143c45077df4fa78e2f1ba455a00bbe1d5b8c (diff) | |
| download | op-kernel-dev-7a258ff04f9d5fe549fed6d03931a0236587047e.zip op-kernel-dev-7a258ff04f9d5fe549fed6d03931a0236587047e.tar.gz | |
Merge branch 'linus' into irq/core
Pick up upstream fixes to avoid conflicts with pending patches.
Diffstat (limited to 'arch/parisc/mm/fault.c')
| -rw-r--r-- | arch/parisc/mm/fault.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c index deab89a..32ec221 100644 --- a/arch/parisc/mm/fault.c +++ b/arch/parisc/mm/fault.c @@ -150,6 +150,23 @@ int fixup_exception(struct pt_regs *regs) d->fault_space = regs->isr; d->fault_addr = regs->ior; + /* + * Fix up get_user() and put_user(). + * ASM_EXCEPTIONTABLE_ENTRY_EFAULT() sets the least-significant + * bit in the relative address of the fixup routine to indicate + * that %r8 should be loaded with -EFAULT to report a userspace + * access error. + */ + if (fix->fixup & 1) { + regs->gr[8] = -EFAULT; + + /* zero target register for get_user() */ + if (parisc_acctyp(0, regs->iir) == VM_READ) { + int treg = regs->iir & 0x1f; + regs->gr[treg] = 0; + } + } + regs->iaoq[0] = (unsigned long)&fix->fixup + fix->fixup; regs->iaoq[0] &= ~3; /* |
