[RFC PATCH] defs.h: Update the range of legacy vsyscall to 4kB

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Currently, There used to be 8 MB reserved for future vsyscalls, but
that's long gone in Kernel. and it updates to 4kB

So Update it to [ffffffffff600000 - ffffffffff600fff].

Signed-off-by: Dou Liyang <douly.fnst@xxxxxxxxxxxxxx>
---
 defs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/defs.h b/defs.h
index 4cd07b8..97738a6 100644
--- a/defs.h
+++ b/defs.h
@@ -3324,7 +3324,7 @@ struct arm64_stackframe {
 #define VMEMMAP_END_5LEVEL         0xffd5ffffffffffff
 
 #define VSYSCALL_START             0xffffffffff600000
-#define VSYSCALL_END               0xffffffffffe00000
+#define VSYSCALL_END               0xffffffffff601000
 
 #define PTOV(X)               ((unsigned long)(X)+(machdep->kvbase))
 #define VTOP(X)               x86_64_VTOP((ulong)(X))
-- 
2.14.3



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