mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-28 05:12:49 +00:00
Code Issues Releases Wiki Activity

ceph: Use no_printk() helper

Browse source 
When printk-indexing is enabled, each printk() invocation emits a
pi_entry structure.  This is even true when the call is protected by an
always-false check: while the actual code to print the message is
optimized out by the compiler, the pi_entry structure is still emitted.

Fix this by replacing "if (0) printk(...)" constructs by calls to the
no_printk() helper.

This reduces the size of an arm64 kernel with CONFIG_PRINTK_INDEX=y and
CONFIG_CEPH_FS=y by ca. 4 KiB.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Chris Down <chris@chrisdown.name>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/a21767eccb823435a7f18cdf115d7d572b4e945d.1709127473.git.geert+renesas@glider.be
Signed-off-by: Petr Mladek <pmladek@suse.com>
This commit is contained in:
Geert Uytterhoeven 2024-02-28 15:00:05 +01:00 committed by Petr Mladek
parent 0381e58894
commit b37cafacbf
1 changed files with 7 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
include/linux/ceph/ceph_debug.h
View file

@ -27,17 +27,13 @@
##__VA_ARGS__)
# else
/* faux printk call just to see any compiler warnings. */
# define dout(fmt, ...) do { \
if (0) \
printk(KERN_DEBUG fmt, ##__VA_ARGS__); \
} while (0)
# define doutc(client, fmt, ...) do { \
if (0) \
printk(KERN_DEBUG "[%pU %llu] " fmt, \
&client->fsid, \
client->monc.auth->global_id, \
##__VA_ARGS__); \
} while (0)
# define dout(fmt, ...) \
no_printk(KERN_DEBUG fmt, ##__VA_ARGS__)
# define doutc(client, fmt, ...) \
no_printk(KERN_DEBUG "[%pU %llu] " fmt, \
&client->fsid, \
client->monc.auth->global_id, \
##__VA_ARGS__)
# endif
#else