[PATCH 6/9] tlsf: use 8-byte alignment for normal malloc allocations

[Ahmad Fatoum]

The current alignment of 4 bytes is too low. Access to 64-bit data via
ldrd/strd requires at least an eight byte alignment:

  | Prior to ARMv6, if the memory address is not 64-bit aligned, the
  | data read from memory is UNPREDICTABLE. Alignment checking (taking
  | a data abort), and support for a big-endian (BE-32) data format are
  | implementation options.

We already have at least an 8 byte alignment for dlmalloc, so have TLSF
follow suit.

Reported-by: Enrico Scholz <enrico.scholz at sigma-chemnitz.de>
Link: https://lore.barebox.org/barebox/ly7d1z1qvs.fsf@ensc-pc.intern.sigma-chemnitz.de/
Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 common/tlsf.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/common/tlsf.c b/common/tlsf.c
index 16682435e492..561635dfd3f3 100644
--- a/common/tlsf.c
+++ b/common/tlsf.c
@@ -35,13 +35,8 @@ enum tlsf_public
 /* Private constants: do not modify. */
 enum tlsf_private
 {
-#if defined (TLSF_64BIT)
 	/* All allocation sizes and addresses are aligned to 8 bytes. */
 	ALIGN_SIZE_LOG2 = 3,
-#else
-	/* All allocation sizes and addresses are aligned to 4 bytes. */
-	ALIGN_SIZE_LOG2 = 2,
-#endif
 	ALIGN_SIZE = (1 << ALIGN_SIZE_LOG2),
 
 	/*
@@ -95,7 +90,7 @@ enum tlsf_private
 #define tlsf_static_assert(exp) \
 	typedef char _tlsf_glue(static_assert, __LINE__) [(exp) ? 1 : -1]
 
-typedef size_t tlsf_size_t;
+typedef uint64_t tlsf_size_t;
 
 /* This code has been tested on 32- and 64-bit (LP/LLP) architectures. */
 tlsf_static_assert(sizeof(int) * CHAR_BIT == 32);
-- 
2.30.2