s390/pai: rework paixxxx_getctr interface

Simplify the interface for functions paicrypt_getctr() and
paiext_getctr(). Change the first parameter from a pointer to a
structure to a pointer to a structure member. The other members
of the structure are not needed.
No functional change.
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Acked-by: Mete Durlu <meted@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

arch/s390/kernel/perf_pai_crypto.c

@@ -111,11 +111,11 @@ static void paicrypt_event_destroy(struct perf_event *event)
 	mutex_unlock(&pai_reserve_mutex);
 }
 
-static u64 paicrypt_getctr(struct paicrypt_map *cpump, int nr, bool kernel)
+static u64 paicrypt_getctr(unsigned long *page, int nr, bool kernel)
 {
 	if (kernel)
 		nr += PAI_CRYPTO_MAXCTR;
-	return cpump->page[nr];
+	return page[nr];
 }
 
 /* Read the counter values. Return value from location in CMP. For event
@@ -129,13 +129,13 @@ static u64 paicrypt_getdata(struct perf_event *event, bool kernel)
 	int i;
 
 	if (event->attr.config != PAI_CRYPTO_BASE) {
-		return paicrypt_getctr(cpump,
+		return paicrypt_getctr(cpump->page,
 				       event->attr.config - PAI_CRYPTO_BASE,
 				       kernel);
 	}
 
 	for (i = 1; i <= paicrypt_cnt; i++) {
-		u64 val = paicrypt_getctr(cpump, i, kernel);
+		u64 val = paicrypt_getctr(cpump->page, i, kernel);
 
 		if (!val)
 			continue;
@@ -383,9 +383,9 @@ static size_t paicrypt_copy(struct pai_userdata *userdata,
 		u64 val = 0;
 
 		if (!exclude_kernel)
-			val += paicrypt_getctr(cpump, i, true);
+			val += paicrypt_getctr(cpump->page, i, true);
 		if (!exclude_user)
-			val += paicrypt_getctr(cpump, i, false);
+			val += paicrypt_getctr(cpump->page, i, false);
 		if (val) {
 			userdata[outidx].num = i;
 			userdata[outidx].value = val;

arch/s390/kernel/perf_pai_ext.c

@@ -276,9 +276,9 @@ static int paiext_event_init(struct perf_event *event)
 	return 0;
 }
 
-static u64 paiext_getctr(struct paiext_map *cpump, int nr)
+static u64 paiext_getctr(unsigned long *area, int nr)
 {
-	return cpump->area[nr];
+	return area[nr];
 }
 
 /* Read the counter values. Return value from location in buffer. For event
@@ -292,10 +292,11 @@ static u64 paiext_getdata(struct perf_event *event)
 	int i;
 
 	if (event->attr.config != PAI_NNPA_BASE)
-		return paiext_getctr(cpump, event->attr.config - PAI_NNPA_BASE);
+		return paiext_getctr(cpump->area,
+				     event->attr.config - PAI_NNPA_BASE);
 
 	for (i = 1; i <= paiext_cnt; i++)
-		sum += paiext_getctr(cpump, i);
+		sum += paiext_getctr(cpump->area, i);
 
 	return sum;
 }
@@ -392,7 +393,7 @@ static size_t paiext_copy(struct paiext_map *cpump)
 	int i, outidx = 0;
 
 	for (i = 1; i <= paiext_cnt; i++) {
-		u64 val = paiext_getctr(cpump, i);
+		u64 val = paiext_getctr(cpump->area, i);
 
 		if (val) {
 			userdata[outidx].num = i;