commit 1b084b2781e348340e4e9de73b5ef5c4763511d4
author Vignesh R <vigneshr@ti.com> Tue Feb 05 11:29:11 2019 +0530
committer Jagan Teki <jagan@amarulasolutions.com> Thu Feb 07 15:33:21 2019 +0530
tree 31e73ed3736140743d285233995c8111f7dc2e0d
parent e57ea11735eb4ddd518d20b57f42d4ff2a434eb0

bitops: Fix GENMASK definition for Sandbox

In arch/sandbox/include/asm/types.h we have
Therefore for 32 bit Sandbox build BITS_PER_LONG turns out to be 32 as
CONFIG_PHYS64 is not set

This messes up the current logic of GENMASK macro due to mismatch b/w
size of unsigned long (64 bit) and that of BITS_PER_LONG.
Fix this by using CONFIG_SANDBOX_BITS_PER_LONG which is set to 64/32
based on the host machine on which its being compiled.

Without this patch:
GENMASK(14,0) => 0x7fffffffffff
After this patch:
GENMASK(14,0) => 0x7fff

Signed-off-by: Vignesh R <vigneshr@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

include/linux/bitops.h

diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index a47f6d1..259df43 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -21,8 +21,13 @@
  * position @h. For example
  * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000.
  */
+#ifdef CONFIG_SANDBOX
+#define GENMASK(h, l) \
+	(((~0UL) << (l)) & (~0UL >> (CONFIG_SANDBOX_BITS_PER_LONG - 1 - (h))))
+#else
 #define GENMASK(h, l) \
 	(((~0UL) << (l)) & (~0UL >> (BITS_PER_LONG - 1 - (h))))
+#endif
 
 #define GENMASK_ULL(h, l) \
 	(((~0ULL) << (l)) & (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h))))