From: Fabio Aiuto <fabioaiuto83@gmail.com>
To: gregkh@linuxfoundation.org
Cc: hdegoede@redhat.com, Larry.Finger@lwfinger.net,
linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org,
David Sterba <dsterba@suse.cz>
Subject: [PATCH v2] staging: rtl8723bs: remove unused BIT macros definitions
Date: Fri, 30 Jul 2021 15:40:48 +0200 [thread overview]
Message-ID: <20210730134048.8736-1-fabioaiuto83@gmail.com> (raw)
BIT(x) macro used all over the driver is defined in
include/vsdo/bit.h as
- #define BIT(nr) (UL(1) << (nr))
which is safer than the local BIT macros declared.
Local macros shift a signed integer which brings
unespected results. For example:
(unsigned long)(1 << 31) => 0xffffffff80000000
shift.c:
int main() {
printf("%lx\n", (unsigned long)(1 << 31));
printf("%lx\n", (unsigned long)(1U << 31));
return 0;
}
...
$ ./shift
ffffffff80000000
80000000
...
So just remove redundant, less safe macro declarations.
Suggested-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
---
Changes in v2:
- Edited changelog
drivers/staging/rtl8723bs/include/osdep_service.h | 4 ----
drivers/staging/rtl8723bs/include/wifi.h | 8 --------
2 files changed, 12 deletions(-)
diff --git a/drivers/staging/rtl8723bs/include/osdep_service.h b/drivers/staging/rtl8723bs/include/osdep_service.h
index b49838c7e457..bde415db4114 100644
--- a/drivers/staging/rtl8723bs/include/osdep_service.h
+++ b/drivers/staging/rtl8723bs/include/osdep_service.h
@@ -14,10 +14,6 @@
#include <osdep_service_linux.h>
-#ifndef BIT
- #define BIT(x) (1 << (x))
-#endif
-
#define BIT0 0x00000001
#define BIT1 0x00000002
#define BIT2 0x00000004
diff --git a/drivers/staging/rtl8723bs/include/wifi.h b/drivers/staging/rtl8723bs/include/wifi.h
index 0bd7b662b972..f03e26818d45 100644
--- a/drivers/staging/rtl8723bs/include/wifi.h
+++ b/drivers/staging/rtl8723bs/include/wifi.h
@@ -7,14 +7,6 @@
#ifndef _WIFI_H_
#define _WIFI_H_
-
-#ifdef BIT
-/* error "BIT define occurred earlier elsewhere!\n" */
-#undef BIT
-#endif
-#define BIT(x) (1 << (x))
-
-
#define WLAN_ETHHDR_LEN 14
#define WLAN_ETHADDR_LEN 6
#define WLAN_IEEE_OUI_LEN 3
--
2.20.1
next reply other threads:[~2021-07-30 13:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-30 13:40 Fabio Aiuto [this message]
-- strict thread matches above, loose matches on Subject: below --
2021-07-30 13:39 [PATCH v2] staging: rtl8723bs: remove unused BIT macros definitions Fabio Aiuto
2021-07-30 13:42 ` Fabio Aiuto
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210730134048.8736-1-fabioaiuto83@gmail.com \
--to=fabioaiuto83@gmail.com \
--cc=Larry.Finger@lwfinger.net \
--cc=dsterba@suse.cz \
--cc=gregkh@linuxfoundation.org \
--cc=hdegoede@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-staging@lists.linux.dev \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.