cxl/core: Use guard() to drop goto pattern of cxl_dpa_alloc()

In cxl_dpa_alloc(), some checking and operations need to be protected by
a rwsem called cxl_dpa_rwsem, so there is a goto pattern in
cxl_dpa_alloc() to release the rwsem. The goto pattern can be optimized
by using guard() to hold the rwsem.

Creating a new function called __cxl_dpa_alloc() to include all checking
and operations needed to be protected by cxl_dpa_rwsem. Using
guard(rwsem_write()) to hold cxl_dpa_rwsem at the beginning of the new
function.

Reviewed-by: Jonathan Cameron <[email protected]>
Reviewed-by: Dave Jiang <[email protected]>
Reviewed-by: Alison Schofield <[email protected]>
Reviewed-by: Dan Williams <[email protected]>
Reviewed-by: Ira Weiny <[email protected]>
Acked-by: Davidlohr Bueso <[email protected]>
Signed-off-by: Li Ming <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Dave Jiang <[email protected]>

0 files changed, 0 insertions, 0 deletions