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authorLinus Torvalds <torvalds@linux-foundation.org>2010-10-24 12:47:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-24 12:47:25 -0700
commit1765a1fe5d6f82c0eceb1ad10594cfc83759b6d0 (patch)
treea701020f0fa3a1932a36d174c5fffd20496303a9 /mm
parentbdaf12b41235b0c59949914de022341e77907461 (diff)
parent2a31339aa014c0d0b97c57d3ebc997732f8f47fc (diff)
Merge branch 'kvm-updates/2.6.37' of git://git.kernel.org/pub/scm/virt/kvm/kvm
* 'kvm-updates/2.6.37' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (321 commits) KVM: Drop CONFIG_DMAR dependency around kvm_iommu_map_pages KVM: Fix signature of kvm_iommu_map_pages stub KVM: MCE: Send SRAR SIGBUS directly KVM: MCE: Add MCG_SER_P into KVM_MCE_CAP_SUPPORTED KVM: fix typo in copyright notice KVM: Disable interrupts around get_kernel_ns() KVM: MMU: Avoid sign extension in mmu_alloc_direct_roots() pae root address KVM: MMU: move access code parsing to FNAME(walk_addr) function KVM: MMU: audit: check whether have unsync sps after root sync KVM: MMU: audit: introduce audit_printk to cleanup audit code KVM: MMU: audit: unregister audit tracepoints before module unloaded KVM: MMU: audit: fix vcpu's spte walking KVM: MMU: set access bit for direct mapping KVM: MMU: cleanup for error mask set while walk guest page table KVM: MMU: update 'root_hpa' out of loop in PAE shadow path KVM: x86 emulator: Eliminate compilation warning in x86_decode_insn() KVM: x86: Fix constant type in kvm_get_time_scale KVM: VMX: Add AX to list of registers clobbered by guest switch KVM guest: Move a printk that's using the clock before it's ready KVM: x86: TSC catchup mode ...
Diffstat (limited to 'mm')
-rw-r--r--mm/util.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/mm/util.c b/mm/util.c
index 4735ea48181..73dac81e9f7 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -245,6 +245,19 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
}
#endif
+/*
+ * Like get_user_pages_fast() except its IRQ-safe in that it won't fall
+ * back to the regular GUP.
+ * If the architecture not support this fucntion, simply return with no
+ * page pinned
+ */
+int __attribute__((weak)) __get_user_pages_fast(unsigned long start,
+ int nr_pages, int write, struct page **pages)
+{
+ return 0;
+}
+EXPORT_SYMBOL_GPL(__get_user_pages_fast);
+
/**
* get_user_pages_fast() - pin user pages in memory
* @start: starting user address