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Subject[PATCHv7 02/19] mm/zsmalloc: Prepare to variable MAX_PHYSMEM_BITS
Date
With boot-time switching between paging mode we will have variable
MAX_PHYSMEM_BITS.

Let's use the maximum variable possible for CONFIG_X86_5LEVEL=y
configuration to define zsmalloc data structures.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
---
mm/zsmalloc.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 7c38e850a8fc..fe22661f2fe5 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -93,7 +93,13 @@
#define MAX_PHYSMEM_BITS BITS_PER_LONG
#endif
#endif
+
+#ifdef CONFIG_X86_5LEVEL
+/* MAX_PHYSMEM_BITS is variable, use maximum value here */
+#define _PFN_BITS (52 - PAGE_SHIFT)
+#else
#define _PFN_BITS (MAX_PHYSMEM_BITS - PAGE_SHIFT)
+#endif

/*
* Memory for allocating for handle keeps object position by
--
2.14.1
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