arm64: fix COMPAT_SHMLBA definition for large pages

ARM glibc uses (4 * __getpagesize()) for SHMLBA, which is correct for 4KB pages and works fine for 64KB pages, but the kernel uses a hardcoded 16KB that is too small for 64KB page based kernels. This changes the definition to what user space sees when using 64KB pages. Acked-by: Arnd Bergmann <[email protected]> Signed-off-by: Yury Norov <[email protected]> Signed-off-by: Will Deacon <[email protected]>
kyagi · Dec 2, 2015 · b9b7aeb · b9b7aeb
1 parent a7c61a3
commit b9b7aeb
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/arch/arm64/include/asm/shmparam.h b/arch/arm64/include/asm/shmparam.h
@@ -21,7 +21,7 @@
  * alignment value. Since we don't have aliasing D-caches, the rest of
  * the time we can safely use PAGE_SIZE.
  */
-#define COMPAT_SHMLBA	0x4000
+#define COMPAT_SHMLBA	(4 * PAGE_SIZE)
 
 #include <asm-generic/shmparam.h>