[PATCH 1/3] x86/mm: Correct the actual count of available global ASIDs

[Hou Wenlong]

The available ASID range for global ASID allocation is
[TLB_NR_DYN_ASIDS, MAX_ASID_AVAILABLE-1], which is a close interval. So
the actual count of available ASIDs for global ASID allocation should be
'(MAX_ASID_AVIALBE-1) - TLB_NR_DYN_ASIDS + 1'.

Fixes: d504d1247e36 ("x86/mm: Add global ASID allocation helper functions")
Signed-off-by: Hou Wenlong <houwenlong.hwl@xxxxxxxxxxxx>
---
 arch/x86/mm/tlb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index e459d97ef397..cad4a8eae2d8 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -279,7 +279,7 @@ static DEFINE_RAW_SPINLOCK(global_asid_lock);
 static u16 last_global_asid = MAX_ASID_AVAILABLE;
 static DECLARE_BITMAP(global_asid_used, MAX_ASID_AVAILABLE);
 static DECLARE_BITMAP(global_asid_freed, MAX_ASID_AVAILABLE);
-static int global_asid_available = MAX_ASID_AVAILABLE - TLB_NR_DYN_ASIDS - 1;
+static int global_asid_available = MAX_ASID_AVAILABLE - TLB_NR_DYN_ASIDS;
 
 /*
  * When the search for a free ASID in the global ASID space reaches
-- 
2.31.1