edac: Don't initialize csrow's first_page & friends when not needed

Almost all edac	drivers	initialize csrow_info->first_page,
csrow_info->last_page and csrow_info->page_mask. Those vars are
used inside the EDAC core, in order to calculate the csrow affected
by an error, by using the routine edac_mc_find_csrow_by_page().

However, very few drivers actually use it:
        e752x_edac.c
        e7xxx_edac.c
        i3000_edac.c
        i82443bxgx_edac.c
        i82860_edac.c
        i82875p_edac.c
        i82975x_edac.c
        r82600_edac.c

There also a few other drivers that have their own calculus
formula internally using those vars.

All the others are just wasting time by initializing those
data.

While initializing data without using them won't cause any troubles, as
those information is stored at the wrong place (at csrows structure), it
is better to remove what is unused, in order to simplify the next patch.

Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Acked-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Hitoshi Mitake <h.mitake@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Niklas Söderlund" <niklas.soderlund@ericsson.com>
Cc: Josh Boyer <jwboyer@gmail.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 0 insertions, 5 deletions

diff --git a/drivers/edac/x38_edac.c b/drivers/edac/x38_edac.c
index f7cc4d214949..bc7f880a4eed 100644
--- a/drivers/edac/x38_edac.c
+++ b/drivers/edac/x38_edac.c
@@ -319,7 +319,6 @@ static int x38_probe1(struct pci_dev *pdev, int dev_idx)
         int rc;
         int i, j;
         struct mem_ctl_info *mci = NULL;
-        unsigned long last_page;
         u16 drbs[X38_CHANNELS][X38_RANKS_PER_CHANNEL];
         bool stacked;
         void __iomem *window;
@@ -363,7 +362,6 @@ static int x38_probe1(struct pci_dev *pdev, int dev_idx)
          * cumulative; the last one will contain the total memory
          * contained in all ranks.
          */
-        last_page = -1UL;
         for (i = 0; i < mci->nr_csrows; i++) {
                 unsigned long nr_pages;
                 struct csrow_info *csrow = &mci->csrows[i];
@@ -375,9 +373,6 @@ static int x38_probe1(struct pci_dev *pdev, int dev_idx)
                 if (nr_pages == 0)
                         continue;
 
-                csrow->first_page = last_page + 1;
-                last_page += nr_pages;
-                csrow->last_page = last_page;
                 csrow->nr_pages = nr_pages;
 
                 for (j = 0; j < x38_channel_num; j++) {