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| author | Arnd Bergmann <arnd@arndb.de> | 2016-03-25 00:19:40 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-02 00:22:17 +0300 |
| commit | 1f62ff34a90471d1b735bac2c79e894afc7c59bc (patch) | |
| tree | 08da9535935e7048ea21b97baacd2c1d56a05b27 /include/linux/device.h | |
| parent | ded9db380d34344ee5263002570b9b8b705f7830 (diff) | |
| download | linux-1f62ff34a90471d1b735bac2c79e894afc7c59bc.tar.xz | |
driver-core: use 'dev' argument in dev_dbg_ratelimited stub
dev_dbg_ratelimited() is a macro that ignores its first argument when DEBUG is
not set, which can lead to unused variable warnings:
ethernet/mellanox/mlxsw/pci.c: In function 'mlxsw_pci_cqe_sdq_handle':
ethernet/mellanox/mlxsw/pci.c:646:18: warning: unused variable 'pdev' [-Wunused-variable]
ethernet/mellanox/mlxsw/pci.c: In function 'mlxsw_pci_cqe_rdq_handle':
ethernet/mellanox/mlxsw/pci.c:671:18: warning: unused variable 'pdev' [-Wunused-variable]
The macro already ensures that all its other arguments are silently
ignored by the compiler without triggering a warning, through the
use of the no_printk() macro, but the dev argument is not passed into
that.
This changes the definition to use the same trick as no_printk() with
an if(0) that leads the compiler to not evaluate the side-effects but
still see that 'dev' might not be unused.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Fixes: 6f586e663e3b ("driver-core: Shut up dev_dbg_reatelimited() without DEBUG")
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/device.h')
| -rw-r--r-- | include/linux/device.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/device.h b/include/linux/device.h index 002c59728dbe..07f74c246cac 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -1293,8 +1293,11 @@ do { \ dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); \ } while (0) #else -#define dev_dbg_ratelimited(dev, fmt, ...) \ - no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) +#define dev_dbg_ratelimited(dev, fmt, ...) \ +do { \ + if (0) \ + dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); \ +} while (0) #endif #ifdef VERBOSE_DEBUG |