pv-on-hvm: fixes for unmodified drivers build and modern Linux

- The adjustments to README and overrides.mk are generic.
- The removal of explicit linux/config.h inclusion should also not
  cause any issues.
- The introduction of irq_handler_t should eliminiate warnings on
  2.6.19+ kernels (I didn't check they're there, but since the
  request_irq prototype changed, I'm sure there's at least
  one. However, as a result changes to the Linux tree are expected to
  be required.
- The change setup_xen_features -> xen_setup_features follows the
  naming in mainline 2.6.23 but would apparently also require changes
  to the Linux tree.
- The changes SA_* -> IRQF_ and  pci_module_init ->
  pci_register_driver should also not cause issues.

Signed-off-by: Jan Beulich <jbeulich@novell.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h b/unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h
index 54a81f6ee9..c720d6e9be 100644
--- a/unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h
+++ b/unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h
@@ -125,4 +125,12 @@ extern char *kasprintf(gfp_t gfp, const char *fmt, ...)
 #define DEFINE_RWLOCK(x) rwlock_t x = RW_LOCK_UNLOCKED
 #endif
 
+#if defined(_LINUX_INTERRUPT_H) && LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
+typedef irqreturn_t (*irq_handler_t)(int, void *, struct pt_regs *);
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
+#define setup_xen_features xen_setup_features
+#endif
+
 #endif