global PAGE_MASK define

it's pretty useful, so it makes sense to define it alongside PAGE_SIZE

1 files changed, 1 insertions, 0 deletions

diff --git a/src/kernel/arch/generic.h b/src/kernel/arch/generic.h
index 22efe58..7ce3d46 100644
--- a/src/kernel/arch/generic.h
+++ b/src/kernel/arch/generic.h
@@ -6,6 +6,7 @@
 // i have no idea where else to put it
 // some code assumes that it's a power of 2
 #define PAGE_SIZE 4096
+#define PAGE_MASK (PAGE_SIZE - 1)
 
 // linker.ld
 extern char _bss_end;