diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2013-03-11 16:09:55 (GMT) |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-02-13 22:21:00 (GMT) |
| commit | 8e3769043a99b8a4bd4706036207e0305b42ec2f (patch) | |
| tree | cb3ed716b22e0dd2c4a2772370a5adef801bf93f /arch | |
| parent | f6c076ea841913dcaf4664b65828c3caf21ba602 (diff) | |
| download | linux-fsl-qoriq-8e3769043a99b8a4bd4706036207e0305b42ec2f.tar.xz | |
x86/highmem: add a "already used pte" check
This is a copy from kmap_atomic_prot().
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/iomap_32.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c index 0c953e3..62377d6 100644 --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -65,6 +65,8 @@ void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot) type = kmap_atomic_idx_push(); idx = type + KM_TYPE_NR * smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); + WARN_ON(!pte_none(*(kmap_pte - idx))); + #ifdef CONFIG_PREEMPT_RT_FULL current->kmap_pte[type] = pte; #endif |