2023-01-21 20:37:50

by Eric Biggers

[permalink] [raw]
Subject: [PATCH 16/38] lib/ext2fs: consistently use #ifdefs in ext2fs_print_bmap_statistics()

From: Eric Biggers <[email protected]>

Since the 'now' variable is only used to calculate 'inuse', and 'inuse'
is only used when defined(ENABLE_BMAP_STATS_OPS), it makes sense to
guard the declaration and initialization of 'now' and 'inuse' by the
same condition, just like the '*_perc' variables in the same function.

This addresses the following compiler warning with clang -Wall:

gen_bitmap64.c:187:9: warning: variable 'inuse' set but not used [-Wunused-but-set-variable]
double inuse;
^
Reviewed-by: Lukas Czerner <[email protected]>
Signed-off-by: Eric Biggers <[email protected]>
---
lib/ext2fs/gen_bitmap64.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/lib/ext2fs/gen_bitmap64.c b/lib/ext2fs/gen_bitmap64.c
index c860c10ed..1a1eeefeb 100644
--- a/lib/ext2fs/gen_bitmap64.c
+++ b/lib/ext2fs/gen_bitmap64.c
@@ -183,11 +183,9 @@ static void ext2fs_print_bmap_statistics(ext2fs_generic_bitmap_64 bitmap)
#ifdef ENABLE_BMAP_STATS_OPS
float mark_seq_perc = 0.0, test_seq_perc = 0.0;
float mark_back_perc = 0.0, test_back_perc = 0.0;
-#endif
- double inuse;
struct timeval now;
+ double inuse;

-#ifdef ENABLE_BMAP_STATS_OPS
if (stats->test_count) {
test_seq_perc = ((float)stats->test_seq /
stats->test_count) * 100;
@@ -201,7 +199,6 @@ static void ext2fs_print_bmap_statistics(ext2fs_generic_bitmap_64 bitmap)
mark_back_perc = ((float)stats->mark_back /
stats->mark_count) * 100;
}
-#endif

if (gettimeofday(&now, (struct timezone *) NULL) == -1) {
perror("gettimeofday");
@@ -212,6 +209,7 @@ static void ext2fs_print_bmap_statistics(ext2fs_generic_bitmap_64 bitmap)
(((double) now.tv_usec) * 0.000001);
inuse -= (double) stats->created.tv_sec + \
(((double) stats->created.tv_usec) * 0.000001);
+#endif /* ENABLE_BMAP_STATS_OPS */

fprintf(stderr, "\n[+] %s bitmap (type %d)\n", bitmap->description,
stats->type);
--
2.39.0