Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-09-29 22:16:01 +00:00
Code Issues Packages Projects Releases Wiki Activity

Lock the kernel address space instead the process' one, if the pages are located in kernel space.

Browse source 
Unlock the address space on error.


svn path=/trunk/; revision=13963
This commit is contained in:
Hartmut Birr 2005-03-12 09:14:38 +00:00
parent 57787bb881
commit 653d79d129
1 changed files with 7 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
reactos/ntoskrnl/mm/mdl.c
View file

@ -361,6 +361,7 @@ VOID STDCALL MmProbeAndLockPages (PMDL Mdl,
KPROCESSOR_MODE Mode;
PFN_TYPE Page;
PEPROCESS CurrentProcess = PsGetCurrentProcess();
PMADDRESS_SPACE AddressSpace;
DPRINT("MmProbeAndLockPages(Mdl %x)\n", Mdl);
@ -394,19 +395,21 @@ VOID STDCALL MmProbeAndLockPages (PMDL Mdl,
//FIXME: why isn't AccessMode used?
Mode = KernelMode;
Mdl->Process = NULL;
AddressSpace = MmGetKernelAddressSpace();
}
else
{
//FIXME: why isn't AccessMode used?
Mode = UserMode;
Mdl->Process = CurrentProcess;
AddressSpace = &CurrentProcess->AddressSpace;
}
/*
* Lock the pages
*/
MmLockAddressSpace(&CurrentProcess->AddressSpace);
MmLockAddressSpace(AddressSpace);
for (i = 0; i < NrPages; i++)
{
@ -430,6 +433,7 @@ VOID STDCALL MmProbeAndLockPages (PMDL Mdl,
MmUnlockPage(Page);
MmDereferencePage(Page);
}
MmUnlockAddressSpace(AddressSpace);
ExRaiseStatus(Status);
}
}
@ -450,6 +454,7 @@ VOID STDCALL MmProbeAndLockPages (PMDL Mdl,
MmUnlockPage(Page);
MmDereferencePage(Page);
}
MmUnlockAddressSpace(AddressSpace);
ExRaiseStatus(Status);
}
}
@ -458,7 +463,7 @@ VOID STDCALL MmProbeAndLockPages (PMDL Mdl,
MmReferencePage(Page);
}
MmUnlockAddressSpace(&CurrentProcess->AddressSpace);
MmUnlockAddressSpace(AddressSpace);
Mdl->MdlFlags |= MDL_PAGES_LOCKED;
}