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Commit cc1092019ce3d9b3e85a285b41e852ff94a6b590

Authored by Bryn Reeves
Committed by Linus Torvalds
1 parent 8560ed6fa8
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

[PATCH] dm: add debug macro 

Add CONFIG_DM_DEBUG and DMDEBUG() macro.

Signed-off-by: Bryn Reeves <breeves@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Showing 2 changed files with 13 additions and 0 deletions Side-by-side Diff

... ... @@ -201,6 +201,14 @@
201 201  
202 202 If unsure, say N.
203 203  
  204 +config DM_DEBUG
  205 + boolean "Device mapper debugging support"
  206 + depends on BLK_DEV_DM && EXPERIMENTAL
  207 + ---help---
  208 + Enable this for messages that may help debug device-mapper problems.
  209 +
  210 + If unsure, say N.
  211 +
204 212 config DM_CRYPT
205 213 tristate "Crypt target support"
206 214 depends on BLK_DEV_DM && EXPERIMENTAL
... ... @@ -21,6 +21,11 @@
21 21 #define DMERR(f, arg...) printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
22 22 #define DMWARN(f, arg...) printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
23 23 #define DMINFO(f, arg...) printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
  24 +#ifdef CONFIG_DM_DEBUG
  25 +# define DMDEBUG(f, arg...) printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX " DEBUG: " f "\n", ## arg)
  26 +#else
  27 +# define DMDEBUG(f, arg...) do {} while (0)
  28 +#endif
24 29  
25 30 #define DMEMIT(x...) sz += ((sz >= maxlen) ? \
26 31 0 : scnprintf(result + sz, maxlen - sz, x))