[PATCH] erofs-utils: Raise maximum block size for aarch64

[Matthew Lear]

Ensure MAX_BLOCK_SIZE is at least 16384 on aarch64 so that native block
sizes can be used without the sub-page fallback.

Signed-off-by: Matthew Lear <matthew.lear at raspberrypi.com>
---
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure.ac b/configure.ac
index cf4de99..8a8e9b3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -322,6 +322,10 @@ AS_IF([test "x$MAX_BLOCK_SIZE" = "x"], [
                              [erofs_cv_max_block_size=`cat conftest.out`],
                              [erofs_cv_max_block_size=4096],
                              [erofs_cv_max_block_size=4096]))
+  dnl Ensure aarch64 supports at least 16K
+  AS_CASE([$build_cpu],
+    [aarch64*], [AS_IF([test "$erofs_cv_max_block_size" -lt 16384],
+                   [erofs_cv_max_block_size=16384])])
 ], [erofs_cv_max_block_size=$MAX_BLOCK_SIZE])

 # Configure multi-threading support
-- 
2.43.0