From: Arnd Bergmann <arnd@xxxxxxxx>
Subject: ia64: mca_drv: fix incorrect array size calculation
gcc points out a mistake in the mca driver that goes back to before the
git history:
arch/ia64/kernel/mca_drv.c: In function 'init_record_index_pools':
arch/ia64/kernel/mca_drv.c:346:54: error: expression does not compute the number of elements in this array; element typ
e is 'int', not 'size_t' {aka 'long unsigned int'} [-Werror=sizeof-array-div]
346 | for (i = 1; i < sizeof sal_log_sect_min_sizes/sizeof(size_t); i++)
| ^
This is the same as sizeof(size_t), which is two shorter than the actual
array. Use the ARRAY_SIZE() macro to get the correct calculation instead.
Link: https://lkml.kernel.org/r/20210514214123.875971-1-arnd@xxxxxxxxxx
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/ia64/kernel/mca_drv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/ia64/kernel/mca_drv.c~ia64-mca_drv-fix-incorrect-array-size-calculation
+++ a/arch/ia64/kernel/mca_drv.c
@@ -343,7 +343,7 @@ init_record_index_pools(void)
/* - 2 - */
sect_min_size = sal_log_sect_min_sizes[0];
- for (i = 1; i < sizeof sal_log_sect_min_sizes/sizeof(size_t); i++)
+ for (i = 1; i < ARRAY_SIZE(sal_log_sect_min_sizes); i++)
if (sect_min_size > sal_log_sect_min_sizes[i])
sect_min_size = sal_log_sect_min_sizes[i];
_
