[PATCH v2 2/7] tlsf: ensure malloc pool is aligned

Ahmad Fatoum a.fatoum at pengutronix.de
Mon Sep 11 08:24:28 PDT 2023

The struct control_t describing a pool is allocated at its very start
and then directly followed by the first block. To ensure the first block
is suitably aligned, align_up the size in tlsf_size(). So far, TLSF on
32-bit and 64-bit happened to be aligned, so this introduces no
functional change just yet. With upcoming changes to the block header to
increase alignment on 32-bit systems, this realignment will become required.

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
 common/tlsf.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/common/tlsf.c b/common/tlsf.c
index 3673b424a4c5..784012a1f7ab 100644
--- a/common/tlsf.c
+++ b/common/tlsf.c
@@ -763,11 +763,11 @@ int tlsf_check_pool(pool_t pool)
 ** Size of the TLSF structures in a given memory block passed to
-** tlsf_create, equal to the size of a control_t
+** tlsf_create, equal to aligned size of a control_t
 size_t tlsf_size(void)
-	return sizeof(control_t);
+	return align_up(sizeof(control_t), ALIGN_SIZE);
 size_t tlsf_align_size(void)

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