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Subject[PATCH RFCv2 12/16] edac: Don't initialize csrow's first_page & friends when not needed
Date
Almost all edac	drivers	initialize first_page, last_page and
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.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
drivers/edac/amd64_edac.c | 38 ++------------------------------------
drivers/edac/i3200_edac.c | 5 -----
drivers/edac/i5000_edac.c | 5 -----
drivers/edac/i5100_edac.c | 2 --
drivers/edac/i5400_edac.c | 5 -----
drivers/edac/i7300_edac.c | 5 +----
drivers/edac/i7core_edac.c | 5 -----
drivers/edac/mv64x60_edac.c | 1 -
drivers/edac/ppc4xx_edac.c | 7 -------
drivers/edac/sb_edac.c | 2 --
drivers/edac/tile_edac.c | 2 --
drivers/edac/x38_edac.c | 5 -----
12 files changed, 3 insertions(+), 79 deletions(-)
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 3e7bddc..b1b1551 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -715,25 +715,6 @@ static inline u64 input_addr_to_sys_addr(struct mem_ctl_info *mci,
input_addr_to_dram_addr(mci, input_addr));
}

-/*
- * Find the minimum and maximum InputAddr values that map to the given @csrow.
- * Pass back these values in *input_addr_min and *input_addr_max.
- */
-static void find_csrow_limits(struct mem_ctl_info *mci, int csrow,
- u64 *input_addr_min, u64 *input_addr_max)
-{
- struct amd64_pvt *pvt;
- u64 base, mask;
-
- pvt = mci->pvt_info;
- BUG_ON((csrow < 0) || (csrow >= pvt->csels[0].b_cnt));
-
- get_cs_base_and_mask(pvt, csrow, 0, &base, &mask);
-
- *input_addr_min = base & ~mask;
- *input_addr_max = base | mask;
-}
-
/* Map the Error address to a PAGE and PAGE OFFSET. */
static inline void error_address_to_page_and_offset(u64 error_address,
u32 *page, u32 *offset)
@@ -2166,7 +2147,7 @@ static int init_csrows(struct mem_ctl_info *mci)
{
struct csrow_info *csrow;
struct amd64_pvt *pvt = mci->pvt_info;
- u64 input_addr_min, input_addr_max, sys_addr, base, mask;
+ u64 base, mask;
u32 val;
int i, j, empty = 1;
enum mem_type mtype;
@@ -2194,14 +2175,7 @@ static int init_csrows(struct mem_ctl_info *mci)

empty = 0;
csrow->nr_pages = amd64_csrow_nr_pages(pvt, 0, i);
- find_csrow_limits(mci, i, &input_addr_min, &input_addr_max);
- sys_addr = input_addr_to_sys_addr(mci, input_addr_min);
- csrow->first_page = (u32) (sys_addr >> PAGE_SHIFT);
- sys_addr = input_addr_to_sys_addr(mci, input_addr_max);
- csrow->last_page = (u32) (sys_addr >> PAGE_SHIFT);
-
get_cs_base_and_mask(pvt, i, 0, &base, &mask);
- csrow->page_mask = ~mask;
/* 8 bytes of resolution */

mtype = amd64_determine_memory_type(pvt, i);
@@ -2221,15 +2195,7 @@ static int init_csrows(struct mem_ctl_info *mci)
}

debugf1(" for MC node %d csrow %d:\n", pvt->mc_node_id, i);
- debugf1(" input_addr_min: 0x%lx input_addr_max: 0x%lx\n",
- (unsigned long)input_addr_min,
- (unsigned long)input_addr_max);
- debugf1(" sys_addr: 0x%lx page_mask: 0x%lx\n",
- (unsigned long)sys_addr, csrow->page_mask);
- debugf1(" nr_pages: %u first_page: 0x%lx "
- "last_page: 0x%lx\n",
- (unsigned)csrow->nr_pages,
- csrow->first_page, csrow->last_page);
+ debugf1(" nr_pages: %u\n", csrow->nr_pages);
}

return empty;
diff --git a/drivers/edac/i3200_edac.c b/drivers/edac/i3200_edac.c
index 38d1e87..8086693 100644
--- a/drivers/edac/i3200_edac.c
+++ b/drivers/edac/i3200_edac.c
@@ -332,7 +332,6 @@ static int i3200_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[I3200_CHANNELS][I3200_RANKS_PER_CHANNEL];
bool stacked;
void __iomem *window;
@@ -377,7 +376,6 @@ static int i3200_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];
@@ -389,9 +387,6 @@ static int i3200_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 < nr_channels; j++) {
diff --git a/drivers/edac/i5000_edac.c b/drivers/edac/i5000_edac.c
index e612f1e..f00f684 100644
--- a/drivers/edac/i5000_edac.c
+++ b/drivers/edac/i5000_edac.c
@@ -1263,11 +1263,6 @@ static int i5000_init_csrows(struct mem_ctl_info *mci)
if (!MTR_DIMMS_PRESENT(mtr) && !MTR_DIMMS_PRESENT(mtr1))
continue;

- /* FAKE OUT VALUES, FIXME */
- p_csrow->first_page = 0 + csrow * 20;
- p_csrow->last_page = 9 + csrow * 20;
- p_csrow->page_mask = 0xFFF;
-
csrow_megs = 0;
for (channel = 0; channel < pvt->maxch; channel++) {
csrow_megs += pvt->dimm_info[csrow][channel].megabytes;
diff --git a/drivers/edac/i5100_edac.c b/drivers/edac/i5100_edac.c
index 1884c36..76489dc 100644
--- a/drivers/edac/i5100_edac.c
+++ b/drivers/edac/i5100_edac.c
@@ -865,8 +865,6 @@ static void __devinit i5100_init_csrows(struct mem_ctl_info *mci)
* FIXME: these two are totally bogus -- I don't see how to
* map them correctly to this structure...
*/
- mci->csrows[i].first_page = total_pages;
- mci->csrows[i].last_page = total_pages + npages - 1;
mci->csrows[i].nr_pages = npages;
mci->csrows[i].csrow_idx = i;
mci->csrows[i].mci = mci;
diff --git a/drivers/edac/i5400_edac.c b/drivers/edac/i5400_edac.c
index 35784f2..015a368 100644
--- a/drivers/edac/i5400_edac.c
+++ b/drivers/edac/i5400_edac.c
@@ -1161,11 +1161,6 @@ static int i5400_init_csrows(struct mem_ctl_info *mci)
if (!MTR_DIMMS_PRESENT(mtr))
continue;

- /* FAKE OUT VALUES, FIXME */
- p_csrow->first_page = 0 + csrow * 20;
- p_csrow->last_page = 9 + csrow * 20;
- p_csrow->page_mask = 0xFFF;
-
csrow_megs = 0;
for (channel = 0; channel < pvt->maxch; channel++)
csrow_megs += pvt->dimm_info[csrow][channel].megabytes;
diff --git a/drivers/edac/i7300_edac.c b/drivers/edac/i7300_edac.c
index 21a8c35..30453fa 100644
--- a/drivers/edac/i7300_edac.c
+++ b/drivers/edac/i7300_edac.c
@@ -778,7 +778,7 @@ static int i7300_init_csrows(struct mem_ctl_info *mci)
int rc = -ENODEV;
int mtr;
int ch, branch, slot, channel;
- u32 last_page = 0, nr_pages;
+ u32 nr_pages;
struct dimm_info *dimm;

pvt = mci->pvt_info;
@@ -832,9 +832,6 @@ static int i7300_init_csrows(struct mem_ctl_info *mci)

/* Update per_csrow memory count */
p_csrow->nr_pages += nr_pages;
- p_csrow->first_page = last_page;
- last_page += nr_pages;
- p_csrow->last_page = last_page;

rc = 0;

diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c
index 66879e6..4425ab9 100644
--- a/drivers/edac/i7core_edac.c
+++ b/drivers/edac/i7core_edac.c
@@ -599,7 +599,6 @@ static int get_dimm_config(struct mem_ctl_info *mci)
struct pci_dev *pdev;
int i, j;
int csrow = 0;
- unsigned long last_page = 0;
enum edac_type mode;
enum mem_type mtype;
struct dimm_info *dimm;
@@ -719,12 +718,8 @@ static int get_dimm_config(struct mem_ctl_info *mci)
npages = MiB_TO_PAGES(size);

csr = &mci->csrows[csrow];
- csr->first_page = last_page + 1;
- last_page += npages;
- csr->last_page = last_page;
csr->nr_pages = npages;

- csr->page_mask = 0;
csr->csrow_idx = csrow;
csr->nr_channels = 1;

diff --git a/drivers/edac/mv64x60_edac.c b/drivers/edac/mv64x60_edac.c
index 12d7fe0..d2e3c39 100644
--- a/drivers/edac/mv64x60_edac.c
+++ b/drivers/edac/mv64x60_edac.c
@@ -668,7 +668,6 @@ static void mv64x60_init_csrows(struct mem_ctl_info *mci,
csrow = &mci->csrows[0];
dimm = csrow->channels[0].dimm;
csrow->nr_pages = pdata->total_mem >> PAGE_SHIFT;
- csrow->last_page = csrow->first_page + csrow->nr_pages - 1;
dimm->grain = 8;

dimm->mtype = (ctl & MV64X60_SDRAM_REGISTERED) ? MEM_RDDR : MEM_DDR;
diff --git a/drivers/edac/ppc4xx_edac.c b/drivers/edac/ppc4xx_edac.c
index 7c98f66..6dc000e 100644
--- a/drivers/edac/ppc4xx_edac.c
+++ b/drivers/edac/ppc4xx_edac.c
@@ -897,7 +897,6 @@ ppc4xx_edac_init_csrows(struct mem_ctl_info *mci, u32 mcopt1)
enum edac_type edac_mode;
int row, j;
u32 mbxcf, size;
- static u32 ppc4xx_last_page;

/* Establish the memory type and width */

@@ -959,10 +958,6 @@ ppc4xx_edac_init_csrows(struct mem_ctl_info *mci, u32 mcopt1)
goto done;
}

- csi->first_page = ppc4xx_last_page;
- csi->last_page = csi->first_page + csi->nr_pages - 1;
- csi->page_mask = 0;
-
/*
* It's unclear exactly what grain should be set to
* here. The SDRAM_ECCES register allows resolution of
@@ -984,8 +979,6 @@ ppc4xx_edac_init_csrows(struct mem_ctl_info *mci, u32 mcopt1)
dimm->dtype = dtype;

dimm->edac_mode = edac_mode;
-
- ppc4xx_last_page += csi->nr_pages;
}
}

diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 537a06e..080ba3d 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -643,8 +643,6 @@ static int get_dimm_config(struct mem_ctl_info *mci)
* csrows.
*/
csr = &mci->csrows[csrow];
- csr->first_page = last_page;
- csr->last_page = last_page + npages - 1;
csr->nr_pages = npages;
csr->csrow_idx = csrow;
csr->nr_channels = 1;
diff --git a/drivers/edac/tile_edac.c b/drivers/edac/tile_edac.c
index db7d2ae..ba0917b 100644
--- a/drivers/edac/tile_edac.c
+++ b/drivers/edac/tile_edac.c
@@ -110,9 +110,7 @@ static int __devinit tile_edac_init_csrows(struct mem_ctl_info *mci)
return -1;
}

- csrow->first_page = 0;
csrow->nr_pages = mem_info.mem_size >> PAGE_SHIFT;
- csrow->last_page = csrow->first_page + csrow->nr_pages - 1;
dimm->grain = TILE_EDAC_ERROR_GRAIN;
dimm->dtype = DEV_UNKNOWN;

diff --git a/drivers/edac/x38_edac.c b/drivers/edac/x38_edac.c
index 52c8d69..7be10dd 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++) {
--
1.7.8


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