[reactos] 01/02: [NTOSKRNL] Use cache aligned buffer for devioctrl

[Pierre Schweitzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=d01184b16460b014fe9b19...

commit d01184b16460b014fe9b19c5a142eb0ed88e6455
Author: Pierre Schweitzer [e-mail]
AuthorDate: Sun Nov 26 13:56:48 2017 +0100

[NTOSKRNL] Use cache aligned buffer for devioctrl
---
 ntoskrnl/io/iomgr/iofunc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/ntoskrnl/io/iomgr/iofunc.c b/ntoskrnl/io/iomgr/iofunc.c
index 46fcce201d..bde78e4f96 100644
--- a/ntoskrnl/io/iomgr/iofunc.c
+++ b/ntoskrnl/io/iomgr/iofunc.c
@@ -213,6 +213,7 @@ IopDeviceFsIoControl(IN HANDLE DeviceHandle,
     ACCESS_MASK DesiredAccess;
     KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
     ULONG BufferLength;
+    POOL_TYPE PoolType;

PAGED_CODE();

@@ -495,6 +496,8 @@ IopDeviceFsIoControl(IN HANDLE DeviceHandle,
     StackPtr->Parameters.DeviceIoControl.OutputBufferLength =
         OutputBufferLength;

+    PoolType = IsDevIoCtl ? NonPagedPoolCacheAligned : NonPagedPool;
+
     /* Handle the Methods */
     switch (AccessType)
     {
@@ -513,7 +516,7 @@ IopDeviceFsIoControl(IN HANDLE DeviceHandle,
                 {
                     /* Allocate the System Buffer */
                     Irp->AssociatedIrp.SystemBuffer =
-                        ExAllocatePoolWithTag(NonPagedPool,
+                        ExAllocatePoolWithTag(PoolType,
                                               BufferLength,
                                               TAG_SYS_BUF);

@@ -560,7 +563,7 @@ IopDeviceFsIoControl(IN HANDLE DeviceHandle,
                 {
                     /* Allocate the System Buffer */
                     Irp->AssociatedIrp.SystemBuffer =
-                        ExAllocatePoolWithTag(NonPagedPool,
+                        ExAllocatePoolWithTag(PoolType,
                                               InputBufferLength,
                                               TAG_SYS_BUF);