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 <vigne...@ti.com>
---
include/linux/bitops.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index a47f6d17bb5f..259df43fb00f 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))))
--
2.20.1
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