[dpdk-dev] [PATCH] igb_uio: fix Xen compatibility with kernel 3.18
Shu Shen
shu.shen at radisys.com
Thu Dec 11 20:33:23 CET 2014
This patch fixes build failing with undefined symbol _PAGE_IOMAP with
kernel 3.18.
The Xen-specific _PAGE_IOMAP PTE flag was removed in kernel 3.18 and
could be used for other purpose in future. This patch ensures that
_PAGE_IOMAP flag is only used for kernels before 3.18.
Signed-off-by: Shu Shen <shu.shen at radisys.com>
---
lib/librte_eal/linuxapp/igb_uio/compat.h | 4 ++++
lib/librte_eal/linuxapp/igb_uio/igb_uio.c | 2 ++
2 files changed, 6 insertions(+)
diff --git a/lib/librte_eal/linuxapp/igb_uio/compat.h b/lib/librte_eal/linuxapp/igb_uio/compat.h
index 9454382..c1d45a6 100644
--- a/lib/librte_eal/linuxapp/igb_uio/compat.h
+++ b/lib/librte_eal/linuxapp/igb_uio/compat.h
@@ -11,6 +11,10 @@
#define pci_cfg_access_unlock pci_unblock_user_cfg_access
#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 0)
+#define HAVE_PTE_MASK_PAGE_IOMAP
+#endif
+
#ifndef PCI_MSIX_ENTRY_SIZE
#define PCI_MSIX_ENTRY_SIZE 16
#define PCI_MSIX_ENTRY_LOWER_ADDR 0
diff --git a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
index 47ff2f3..60a2db1 100644
--- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
+++ b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
@@ -287,7 +287,9 @@ igbuio_dom0_mmap_phys(struct uio_info *info, struct vm_area_struct *vma)
idx = (int)vma->vm_pgoff;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+#if defined(HAVE_PTE_MASK_PAGE_IOMAP)
vma->vm_page_prot.pgprot |= _PAGE_IOMAP;
+#endif
return remap_pfn_range(vma,
vma->vm_start,
--
1.9.1
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