[PATCH] reduce MAX_NR_ZONES: remove display of counters for unconfigured zones

eventcounters: Do not display counters for zones that are not available on an
arch

Do not define or display counters for the DMA32 and the HIGHMEM zone if such
zones were not configured.

[akpm@osdl.org: s390 fix]
[heiko.carstens@de.ibm.com: s390 fix]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 34 insertions, 26 deletions

diff --git a/arch/s390/appldata/appldata_mem.c b/arch/s390/appldata/appldata_mem.c
index ab3b0765a64e..8aea3698a77b 100644
--- a/arch/s390/appldata/appldata_mem.c
+++ b/arch/s390/appldata/appldata_mem.c
@@ -117,8 +117,7 @@ static void appldata_get_mem_data(void *data)
         mem_data->pgpgout    = ev[PGPGOUT] >> 1;
         mem_data->pswpin     = ev[PSWPIN];
         mem_data->pswpout    = ev[PSWPOUT];
-        mem_data->pgalloc    = ev[PGALLOC_HIGH] + ev[PGALLOC_NORMAL] +
-                               ev[PGALLOC_DMA];
+        mem_data->pgalloc    = ev[PGALLOC_NORMAL] + ev[PGALLOC_DMA];
         mem_data->pgfault    = ev[PGFAULT];
         mem_data->pgmajfault = ev[PGMAJFAULT];
 
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 9c6e62c56ec2..176c7f797339 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -18,7 +18,19 @@
  * generated will simply be the increment of a global address.
  */
 
-#define FOR_ALL_ZONES(x) x##_DMA, x##_DMA32, x##_NORMAL, x##_HIGH
+#ifdef CONFIG_ZONE_DMA32
+#define DMA32_ZONE(xx) xx##_DMA32,
+#else
+#define DMA32_ZONE(xx)
+#endif
+
+#ifdef CONFIG_HIGHMEM
+#define HIGHMEM_ZONE(xx) , xx##_HIGH
+#else
+#define HIGHMEM_ZONE(xx)
+#endif
+
+#define FOR_ALL_ZONES(xx) xx##_DMA, DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx)
 
 enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
                 FOR_ALL_ZONES(PGALLOC),
diff --git a/mm/vmstat.c b/mm/vmstat.c
index c1b5f4106b38..04a9093f649e 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -435,6 +435,21 @@ struct seq_operations fragmentation_op = {
         .show   = frag_show,
 };
 
+#ifdef CONFIG_ZONE_DMA32
+#define TEXT_FOR_DMA32(xx) xx "_dma32",
+#else
+#define TEXT_FOR_DMA32(xx)
+#endif
+
+#ifdef CONFIG_HIGHMEM
+#define TEXT_FOR_HIGHMEM(xx) xx "_high",
+#else
+#define TEXT_FOR_HIGHMEM(xx)
+#endif
+
+#define TEXTS_FOR_ZONES(xx) xx "_dma", TEXT_FOR_DMA32(xx) xx "_normal", \
+                                        TEXT_FOR_HIGHMEM(xx)
+
 static char *vmstat_text[] = {
         /* Zoned VM counters */
         "nr_anon_pages",
@@ -462,10 +477,7 @@ static char *vmstat_text[] = {
         "pswpin",
         "pswpout",
 
-        "pgalloc_dma",
-        "pgalloc_dma32",
-        "pgalloc_normal",
-        "pgalloc_high",
+        TEXTS_FOR_ZONES("pgalloc")
 
         "pgfree",
         "pgactivate",
@@ -474,25 +486,10 @@ static char *vmstat_text[] = {
         "pgfault",
         "pgmajfault",
 
-        "pgrefill_dma",
-        "pgrefill_dma32",
-        "pgrefill_normal",
-        "pgrefill_high",
-
-        "pgsteal_dma",
-        "pgsteal_dma32",
-        "pgsteal_normal",
-        "pgsteal_high",
-
-        "pgscan_kswapd_dma",
-        "pgscan_kswapd_dma32",
-        "pgscan_kswapd_normal",
-        "pgscan_kswapd_high",
-
-        "pgscan_direct_dma",
-        "pgscan_direct_dma32",
-        "pgscan_direct_normal",
-        "pgscan_direct_high",
+        TEXTS_FOR_ZONES("pgrefill")
+        TEXTS_FOR_ZONES("pgsteal")
+        TEXTS_FOR_ZONES("pgscan_kswapd")
+        TEXTS_FOR_ZONES("pgscan_direct")
 
         "pginodesteal",
         "slabs_scanned",