[patch 007/192] ia64: mca_drv: fix incorrect array size calculation

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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];
 
_



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