From 5140d7e924ffc6495cff383685e7ae016da0de22 Mon Sep 17 00:00:00 2001
From: Mike Christie <michaelc@cs.wisc.edu>
Date: Fri, 15 Aug 2008 21:14:04 -0500
Subject: [PATCH] Add compat patch for RHEL 5.2

from Erez Zilber

The 2.6.14-19_compat.patch checks the kernel version. However,
the RHEL 5.2 kernel includes code that does not exist in the
vanilla kernel. This causes symbol redefinition.

Signed-off-by: Erez Zilber <erezzi.list@gmail.com>
---
 kernel/2.6.14-19_compat.patch |   41 +++++++++++++++++++++++++++++++++++++----
 1 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/kernel/2.6.14-19_compat.patch b/kernel/2.6.14-19_compat.patch
index 8a00ad4..2835b35 100644
--- a/kernel/2.6.14-19_compat.patch
+++ b/kernel/2.6.14-19_compat.patch
@@ -311,10 +311,10 @@ index cfc5fa6..ede08ef 100644
  struct scsi_device;
 diff --git a/open_iscsi_compat.h b/open_iscsi_compat.h
 new file mode 100644
-index 0000000..7ea4643
+index 0000000..ecd48df
 --- /dev/null
 +++ b/open_iscsi_compat.h
-@@ -0,0 +1,270 @@
+@@ -0,0 +1,303 @@
 +#include <linux/version.h>
 +#include <linux/kernel.h>
 +#include <scsi/scsi.h>
@@ -468,12 +468,21 @@ index 0000000..7ea4643
 +#endif
 +
 +#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,20)
-+
++#ifdef RHEL_RELEASE_VERSION
++#if RHEL_RELEASE_CODE < RHEL_RELEASE_VERSION(5,2)
++static inline int is_power_of_2(unsigned long n)
++{
++	return (n != 0 && ((n & (n - 1)) == 0));
++}
++#endif
++#else
++/* not a redhat kernel */
 +static inline int is_power_of_2(unsigned long n)
 +{
 +	return (n != 0 && ((n & (n - 1)) == 0));
 +}
 +#endif
++#endif
 +
 +#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,21)
 +
@@ -485,11 +494,20 @@ index 0000000..7ea4643
 +#endif
 +
 +#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,22)
-+
++#ifdef RHEL_RELEASE_VERSION
++#if RHEL_RELEASE_CODE < RHEL_RELEASE_VERSION(5,2)
++static inline void *shost_priv(struct Scsi_Host *shost)
++{
++	return (void *)shost->hostdata;
++}
++#endif
++#else
++/* not a redhat kernel */
 +static inline void *shost_priv(struct Scsi_Host *shost)
 +{
 +	return (void *)shost->hostdata;
 +}
++#endif
 +
 +/*
 + * Note: We do not support bidi for the compat modules if the kernel
@@ -499,6 +517,20 @@ index 0000000..7ea4643
 +#define scsi_sglist(cmd) ((struct scatterlist *)(cmd)->request_buffer)
 +#define scsi_bufflen(cmd) ((cmd)->request_bufflen)
 +
++#ifdef RHEL_RELEASE_VERSION
++#if RHEL_RELEASE_CODE < RHEL_RELEASE_VERSION(5,2)
++static inline void scsi_set_resid(struct scsi_cmnd *cmd, int resid)
++{
++	cmd->resid = resid;
++}
++
++static inline int scsi_get_resid(struct scsi_cmnd *cmd)
++{
++	return cmd->resid;
++}
++#endif
++#else
++/* not a redhat kernel */
 +static inline void scsi_set_resid(struct scsi_cmnd *cmd, int resid)
 +{
 +	cmd->resid = resid;
@@ -508,6 +540,7 @@ index 0000000..7ea4643
 +{
 +	return cmd->resid;
 +}
++#endif
 +
 +#endif
 +
-- 
1.5.2.4