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author | Joe Perches <joe@perches.com> | 2015-06-25 01:54:53 +0200 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-25 02:49:39 +0200 |
commit | 7c2bd2f930aefbc93b90140fa37fa2547728c84c (patch) | |
tree | 64fa81a5a6e7803231fc2be91e3f08d2c5d9b676 /fs/ocfs2/cluster | |
parent | configfs: unexport/make static config_item_init() (diff) | |
download | linux-7c2bd2f930aefbc93b90140fa37fa2547728c84c.tar.xz linux-7c2bd2f930aefbc93b90140fa37fa2547728c84c.zip |
ocfs2: reduce object size of mlog uses
Using a function for __mlog_printk instead of a macro reduces the object
size of built-in.o by about 190KB, or ~18% overall (x86-64 defconfig
with all ocfs2 options)
$ size fs/ocfs2/built-in.o*
text data bss dec hex filename
870954 118471 134408 1123833 1125f9 fs/ocfs2/built-in.o,new
1064081 118071 134408 1316560 1416d0 fs/ocfs2/built-in.o.old
Miscellanea:
- Move the used-once __mlog_cpu_guess statement expression macro to the
masklog.c file above the use in __mlog_printk function
- Simplify the mlog macro moving the and/or logic and level code into
__mlog_printk
[akpm@linux-foundation.org: export __mlog_printk() to other ocfs2 modules]
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/cluster')
-rw-r--r-- | fs/ocfs2/cluster/masklog.c | 47 | ||||
-rw-r--r-- | fs/ocfs2/cluster/masklog.h | 42 |
2 files changed, 59 insertions, 30 deletions
diff --git a/fs/ocfs2/cluster/masklog.c b/fs/ocfs2/cluster/masklog.c index af7598bff1b5..c2182ba1013c 100644 --- a/fs/ocfs2/cluster/masklog.c +++ b/fs/ocfs2/cluster/masklog.c @@ -64,6 +64,53 @@ static ssize_t mlog_mask_store(u64 mask, const char *buf, size_t count) return count; } +/* + * smp_processor_id() "helpfully" screams when called outside preemptible + * regions in current kernels. sles doesn't have the variants that don't + * scream. just do this instead of trying to guess which we're building + * against.. *sigh*. + */ +#define __mlog_cpu_guess \ +({ \ + unsigned long _cpu = get_cpu(); \ + put_cpu(); \ + _cpu; \ +}) + +void __mlog_printk(const u64 *mask, const char *func, int line, + const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + const char *level; + const char *prefix = ""; + + if (!__mlog_test_u64(*mask, mlog_and_bits) || + __mlog_test_u64(*mask, mlog_not_bits)) + return; + + if (*mask & ML_ERROR) { + level = KERN_ERR; + prefix = "ERROR: "; + } else if (*mask & ML_NOTICE) { + level = KERN_NOTICE; + } else { + level = KERN_INFO; + } + + va_start(args, fmt); + + vaf.fmt = fmt; + vaf.va = &args; + + printk("%s(%s,%u,%lu):%s:%d %s%pV", + level, current->comm, task_pid_nr(current), __mlog_cpu_guess, + func, line, prefix, &vaf); + + va_end(args); +} +EXPORT_SYMBOL_GPL(__mlog_printk); + struct mlog_attribute { struct attribute attr; u64 mask; diff --git a/fs/ocfs2/cluster/masklog.h b/fs/ocfs2/cluster/masklog.h index 7fdc25a4d8c0..308ea0eb35fd 100644 --- a/fs/ocfs2/cluster/masklog.h +++ b/fs/ocfs2/cluster/masklog.h @@ -162,38 +162,20 @@ extern struct mlog_bits mlog_and_bits, mlog_not_bits; #endif -/* - * smp_processor_id() "helpfully" screams when called outside preemptible - * regions in current kernels. sles doesn't have the variants that don't - * scream. just do this instead of trying to guess which we're building - * against.. *sigh*. - */ -#define __mlog_cpu_guess ({ \ - unsigned long _cpu = get_cpu(); \ - put_cpu(); \ - _cpu; \ -}) +__printf(4, 5) +void __mlog_printk(const u64 *m, const char *func, int line, + const char *fmt, ...); -/* In the following two macros, the whitespace after the ',' just - * before ##args is intentional. Otherwise, gcc 2.95 will eat the - * previous token if args expands to nothing. +/* + * Testing before the __mlog_printk call lets the compiler eliminate the + * call completely when (m & ML_ALLOWED_BITS) is 0. */ -#define __mlog_printk(level, fmt, args...) \ - printk(level "(%s,%u,%lu):%s:%d " fmt, current->comm, \ - task_pid_nr(current), __mlog_cpu_guess, \ - __PRETTY_FUNCTION__, __LINE__ , ##args) - -#define mlog(mask, fmt, args...) do { \ - u64 __m = MLOG_MASK_PREFIX | (mask); \ - if ((__m & ML_ALLOWED_BITS) && \ - __mlog_test_u64(__m, mlog_and_bits) && \ - !__mlog_test_u64(__m, mlog_not_bits)) { \ - if (__m & ML_ERROR) \ - __mlog_printk(KERN_ERR, "ERROR: "fmt , ##args); \ - else if (__m & ML_NOTICE) \ - __mlog_printk(KERN_NOTICE, fmt , ##args); \ - else __mlog_printk(KERN_INFO, fmt , ##args); \ - } \ +#define mlog(mask, fmt, ...) \ +do { \ + u64 _m = MLOG_MASK_PREFIX | (mask); \ + if (_m & ML_ALLOWED_BITS) \ + __mlog_printk(&_m, __func__, __LINE__, fmt, \ + ##__VA_ARGS__); \ } while (0) #define mlog_errno(st) ({ \ |