GCC9 for ARM produces the following warnings:
fastmap.c: In function 'ubi_attach_fastmap':
fastmap.c:700:31: warning: taking address of packed member of 'struct ubi_fm_scan_pool' may result in an unaligned pointer value [-Waddress-of-packed-member]
700 | ret = scan_pool(ubi, ai, fmpl->pebs, pool_size, &max_sqnum, &lfree);
| ~~~~^~~~~~
fastmap.c:704:34: warning: taking address of packed member of 'struct ubi_fm_scan_pool' may result in an unaligned pointer value [-Waddress-of-packed-member]
704 | ret = scan_pool(ubi, ai, fmpl_wl->pebs, wl_pool_size, &max_sqnum, &lfree);
| ~~~~~~~^~~~~~
the offending code seems OK and there doesn't seem to be a way to fix
this in code, so disable the warning for that file.
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
drivers/mtd/ubi/Makefile | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/mtd/ubi/Makefile b/drivers/mtd/ubi/Makefile
index 33ac39026c..6ffb4ae2bc 100644
--- a/drivers/mtd/ubi/Makefile
+++ b/drivers/mtd/ubi/Makefile
@@ -2,4 +2,5 @@ obj-$(CONFIG_MTD_UBI) += ubi.o
ubi-y += vtbl.o vmt.o upd.o build.o barebox.o kapi.o eba.o io.o wl.o attach.o
ubi-y += misc.o debug.o
+CFLAGS_fastmap.o := -Wno-address-of-packed-member
ubi-$(CONFIG_MTD_UBI_FASTMAP) += fastmap.o
--
2.21.0
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