01/01: [FASTFAT] Drop read ahead locking routines in favor of lazy writer routines. This avoids code duplication while being consistent with MS FastFAT.

[Pierre Schweitzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=69f51d153394c8b2223ff…
commit 69f51d153394c8b2223ffa3b92805dffe45f0673
Author:     Pierre Schweitzer <pierre(a)reactos.org>
AuthorDate: Sat Feb 17 13:48:32 2018 +0100
Commit:     Pierre Schweitzer <pierre(a)reactos.org>
CommitDate: Sat Feb 17 13:49:15 2018 +0100
    [FASTFAT] Drop read ahead locking routines in favor of lazy writer routines.
    This avoids code duplication while being consistent with MS FastFAT.
---
 drivers/filesystems/fastfat/fastio.c | 30 ------------------------------
 drivers/filesystems/fastfat/iface.c  |  4 ++--
 drivers/filesystems/fastfat/vfat.h   | 11 -----------
 3 files changed, 2 insertions(+), 43 deletions(-)
diff --git a/drivers/filesystems/fastfat/fastio.c b/drivers/filesystems/fastfat/fastio.c
index 58d3f0d587..248f39f5bf 100644
--- a/drivers/filesystems/fastfat/fastio.c
+++ b/drivers/filesystems/fastfat/fastio.c
@@ -753,36 +753,6 @@ VfatReleaseFromLazyWrite(
     ExReleaseResourceLite(&(Fcb->MainResource));
 }
-BOOLEAN
-NTAPI
-VfatAcquireForReadAhead(
-    IN PVOID Context,
-    IN BOOLEAN Wait)
-{
-    PVFATFCB Fcb = (PVFATFCB)Context;
-    ASSERT(Fcb);
-    DPRINT("VfatAcquireForReadAhead(): Fcb %p\n", Fcb);
-
-    if (!ExAcquireResourceExclusiveLite(&(Fcb->MainResource), Wait))
-    {
-        DPRINT("VfatAcquireForReadAhead(): ExReleaseResourceLite failed.\n");
-        return FALSE;
-    }
-    return TRUE;
-}
-
-VOID
-NTAPI
-VfatReleaseFromReadAhead(
-    IN PVOID Context)
-{
-    PVFATFCB Fcb = (PVFATFCB)Context;
-    ASSERT(Fcb);
-    DPRINT("VfatReleaseFromReadAhead(): Fcb %p\n", Fcb);
-
-    ExReleaseResourceLite(&(Fcb->MainResource));
-}
-
 INIT_SECTION
 VOID
 VfatInitFastIoRoutines(
diff --git a/drivers/filesystems/fastfat/iface.c b/drivers/filesystems/fastfat/iface.c
index c334a95aed..02e570ea45 100644
--- a/drivers/filesystems/fastfat/iface.c
+++ b/drivers/filesystems/fastfat/iface.c
@@ -119,8 +119,8 @@ DriverEntry(
     /* Cache manager */
     VfatGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = VfatAcquireForLazyWrite;
     VfatGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = VfatReleaseFromLazyWrite;
-    VfatGlobalData->CacheMgrCallbacks.AcquireForReadAhead = VfatAcquireForReadAhead;
-    VfatGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = VfatReleaseFromReadAhead;
+    VfatGlobalData->CacheMgrCallbacks.AcquireForReadAhead = VfatAcquireForLazyWrite;
+    VfatGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = VfatReleaseFromLazyWrite;
     /* Fast I/O */
     VfatInitFastIoRoutines(&VfatGlobalData->FastIoDispatch);
diff --git a/drivers/filesystems/fastfat/vfat.h b/drivers/filesystems/fastfat/vfat.h
index f6e2aa6452..487b5f9ab2 100644
--- a/drivers/filesystems/fastfat/vfat.h
+++ b/drivers/filesystems/fastfat/vfat.h
@@ -775,17 +775,6 @@ NTAPI
 VfatReleaseFromLazyWrite(
     IN PVOID Context);
-BOOLEAN
-NTAPI
-VfatAcquireForReadAhead(
-    IN PVOID Context,
-    IN BOOLEAN Wait);
-
-VOID
-NTAPI
-VfatReleaseFromReadAhead(
-    IN PVOID Context);
-
 /* fat.c */
 NTSTATUS