From 06a3d080b4b74d114dba028f5a3637f1c6aa5cbe Mon Sep 17 00:00:00 2001
From: Chas Williams <chas@cmf.nrl.navy.mil>
Date: Sat, 21 Apr 2001 02:23:04 +0000
Subject: [PATCH] 
 linux-call-truncate-inode-pages-in-preference-to-invalidate-inode-pages-20010420

To cure "Failed to invalidate all pages on inode 0xc9208720"

====================
This delta was composed from multiple commits as part of the CVS->Git migration.
The checkin message with each commit was inconsistent.
The following are the additional commit messages.
====================
---
 src/afs/LINUX/osi_misc.c |  4 ++++
 src/afs/LINUX/osi_vm.c   | 22 ++++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/src/afs/LINUX/osi_misc.c b/src/afs/LINUX/osi_misc.c
index d9b05158f..1f2216113 100644
--- a/src/afs/LINUX/osi_misc.c
+++ b/src/afs/LINUX/osi_misc.c
@@ -302,7 +302,11 @@ void osi_linux_free_inode_pages(void)
 #else
 	    if (ip->i_nrpages) {
 #endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,15)
+	        truncate_inode_pages(&ip->i_data, 0);
+#else
 		invalidate_inode_pages(ip);
+#endif
 #if defined(AFS_LINUX24_ENV)
 		if (ip->i_data.nrpages) {
 #else
diff --git a/src/afs/LINUX/osi_vm.c b/src/afs/LINUX/osi_vm.c
index 2b8fbb793..927d99245 100644
--- a/src/afs/LINUX/osi_vm.c
+++ b/src/afs/LINUX/osi_vm.c
@@ -45,7 +45,11 @@ int osi_VM_FlushVCache(struct vcache *avc, int *slept)
     if (avc->opens != 0)
 	return EBUSY;
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,15)
+    truncate_inode_pages(&ip->i_data, 0);
+#else
     invalidate_inode_pages(ip);
+#endif
     return 0;
 }
 
@@ -60,7 +64,13 @@ int osi_VM_FlushVCache(struct vcache *avc, int *slept)
  */
 void osi_VM_TryToSmush(struct vcache *avc, struct AFS_UCRED *acred, int sync)
 {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,15)
+    struct inode *ip = (struct inode*)avc;
+
+    truncate_inode_pages(&ip->i_data, 0);
+#else
     invalidate_inode_pages((struct inode *)avc);
+#endif
 }
 
 /* Flush and invalidate pages, for fsync() with INVAL flag
@@ -88,7 +98,13 @@ void osi_VM_StoreAllSegments(struct vcache *avc)
  */
 void osi_VM_FlushPages(struct vcache *avc, struct AFS_UCRED *credp)
 {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,15)
+    struct inode *ip = (struct inode*)avc;
+
+    truncate_inode_pages(&ip->i_data, 0);
+#else
     invalidate_inode_pages((struct inode*)avc);
+#endif
 }
 
 /* Purge pages beyond end-of-file, when truncating a file.
@@ -99,5 +115,11 @@ void osi_VM_FlushPages(struct vcache *avc, struct AFS_UCRED *credp)
  */
 void osi_VM_Truncate(struct vcache *avc, int alen, struct AFS_UCRED *acred)
 {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,15)
+    struct inode *ip = (struct inode*)avc;
+
+    truncate_inode_pages(&ip->i_data, alen);
+#else
     invalidate_inode_pages((struct inode*)avc);
+#endif
 }
-- 
2.39.5