[PATCH 0/2 v4] Add cond_guard() to conditional guards

[Fabio M. De Francesco]

Add cond_guard() macro to conditional guards and use it to replace an
open-coded up_read() in show_targetN() and remove a block marked by an
'out' label.

Cc: Dave Jiang <dave.jiang@xxxxxxxxx>
Cc: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Suggested-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Suggested-by: Ira Weiny <ira.weiny@xxxxxxxxx>
Signed-off-by: Fabio M. De Francesco <fabio.maria.de.francesco@xxxxxxxxxxxxxxx>
---

Changes from RFC v4:
        Changed the interface of cond_guard() to take a variable to store
        a return code, the succes code and failure code, to enable a
        later check of the returned code in that variable.
Changes from RFC v5:
        Changed the interface of cond_guard() to take a statement or 
        statement-expression as its second argument to conform to Dan's 
        suggestion (thanks).
Changes from v1:
        Fixed a grammar error in the commit message of 1/2; replaced the
        name of the second argument of cond_guard() with '_fail'
        according to Jonathan's comments (thanks). 
Changes from v2:
        Changed macro's implementation to add an 'else' to protect
        against it being used incorrectly within another if() block.
        Suggested by Dan (thanks). The Reviewed-by tags on 1/2 are not
        forwarded because the implementation of cond_guard() has changed.
        Removed a redundant 'else' from show_targetN() in 2/2.
Changes from v3:
	Added braces around empty body in an 'else' statement in
	cond_guard(). Added Reviewed-by tags (Dave, Ira - thanks).

Fabio M. De Francesco (2):
  cleanup: Add cond_guard() to conditional guards
  cxl/region: Use cond_guard() in show_targetN()

 drivers/cxl/core/region.c | 16 ++++------------
 include/linux/cleanup.h   | 15 +++++++++++++++
 2 files changed, 19 insertions(+), 12 deletions(-)

-- 
2.43.0