diff options
| author | Thorsten Blum <thorsten.blum@toblux.com> | 2024-07-10 23:52:39 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-07-31 13:12:02 +0200 |
| commit | 104831a17518796fb29e803fe07eb87ce9df884d (patch) | |
| tree | ff00f04a994d5a4f346de6c625f73d70de2fbda4 | |
| parent | 4d41a49c4660eca5214d8b6f85cc8569c7d77599 (diff) | |
hpet: Optimize local variable data type in hpet_alloc()
The local variable period uses at most 32 bits and can be a u32 instead
of unsigned long. The upper 32 bits are all 0 after masking and right
shifting cap by HPET_COUNTER_CLK_PERIOD_SHIFT and can be discarded.
Since do_div() casts the divisor to u32 anyway, changing the data type
of period to u32 also removes the following Coccinelle/coccicheck
warning reported by do_div.cocci:
WARNING: do_div() does a 64-by-32 division, please consider using div64_ul instead
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20240710215238.799239-2-thorsten.blum@toblux.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/char/hpet.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index da32e8ed0830..f6c92106eb98 100644 --- a/drivers/char/hpet.c +++ b/drivers/char/hpet.c @@ -808,7 +808,7 @@ int hpet_alloc(struct hpet_data *hdp) struct hpets *hpetp; struct hpet __iomem *hpet; static struct hpets *last; - unsigned long period; + u32 period; unsigned long long temp; u32 remainder; |