https://git.reactos.org/?p=reactos.git;a=commitdiff;h=acdf74aa3b92a49336f413dd524b8840c56bbb84
commit acdf74aa3b92a49336f413dd524b8840c56bbb84 Author: Pierre Schweitzer <[email protected]> AuthorDate: Sat Nov 17 15:49:50 2018 +0100 Commit: Pierre Schweitzer <[email protected]> CommitDate: Sat Nov 17 16:44:36 2018 +0100 [NTOSKRNL] Properly align runrefs on SMP in ExInitializeRundownProtectionCacheAware() --- ntoskrnl/ex/rundown.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/ntoskrnl/ex/rundown.c b/ntoskrnl/ex/rundown.c index cde0bf7aea..340a2d8832 100644 --- a/ntoskrnl/ex/rundown.c +++ b/ntoskrnl/ex/rundown.c @@ -581,7 +581,7 @@ ExInitializeRundownProtectionCacheAware(IN PEX_RUNDOWN_REF_CACHE_AWARE RunRefCac { PVOID Pool; PEX_RUNDOWN_REF RunRef; - ULONG Count, RunRefSize, Offset; + ULONG Count, RunRefSize, Offset, Align; PAGED_CODE(); @@ -601,8 +601,13 @@ ExInitializeRundownProtectionCacheAware(IN PEX_RUNDOWN_REF_CACHE_AWARE RunRefCac } else { - /* FIXME: Properly align on SMP */ - UNIMPLEMENTED; + /* Get alignment constraint */ + Align = KeGetRecommendedSharedDataAlignment(); + + /* How many runrefs given the alignment? */ + RunRefSize = Align; + Count = ((Size - sizeof(EX_RUNDOWN_REF_CACHE_AWARE)) / Align) - 1; + Pool = (PVOID)ALIGN_UP_BY(Pool, Align); } /* Initialize the structure */
