[PATCH v5 2/5] ramoops: Add __ramoops_init_prz() as generic function

[Nobuhiro Iwamatsu <nobuhiro.iwamatsu.kw@hitachi.com>]

This commit adds generic function __ramoops_init_prz() to reduce redundancy
between ramoops_init_prz() and ramoops_init_przs().

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.kw@hitachi.com>
Signed-off-by: Hiraku Toyooka <hiraku.toyooka.gu@hitachi.com>
Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Seiji Aguchi <seiji.aguchi.tr@hitachi.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Tony Luck <tony.luck@intel.com>

V5:
  - No changes.

V4:
  - Rebase.

V3:
  - Rebase.
  - Split patch.
---
 fs/pstore/ram.c | 73 ++++++++++++++++++++++++++++++---------------------------
 1 file changed, 38 insertions(+), 35 deletions(-)

diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 8ad2d6d8cec2..48cfeef42cb6 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -520,6 +520,40 @@ static void ramoops_free_przs(struct persistent_ram_zone **przs)
 	kfree(przs);
 }
 
+static int __ramoops_init_prz(const char *name,
+			      struct device *dev, struct ramoops_context *cxt,
+			      struct persistent_ram_zone **prz,
+			      phys_addr_t *paddr, size_t sz, u32 sig,
+			      u32 flags, bool zap)
+{
+	if (!sz)
+		return 0;
+
+	if (zap && *paddr + sz - cxt->phys_addr > cxt->size) {
+		dev_err(dev, "no room for %s mem region (0x%zx@0x%llx) in (0x%lx@0x%llx)\n",
+			name, sz, (unsigned long long)*paddr,
+			cxt->size, (unsigned long long)cxt->phys_addr);
+		return -ENOMEM;
+	}
+
+	*prz = persistent_ram_new(*paddr, sz, sig, &cxt->ecc_info,
+				  cxt->memtype, flags);
+	if (IS_ERR(*prz)) {
+		int err = PTR_ERR(*prz);
+
+		dev_err(dev, "failed to request %s mem region (0x%zx@0x%llx): %d\n",
+			name, sz, (unsigned long long)*paddr, err);
+		return err;
+	}
+
+	if (zap)
+		persistent_ram_zap(*prz);
+
+	*paddr += sz;
+
+	return 0;
+}
+
 static int ramoops_init_przs(const char *name,
 			     struct device *dev, struct ramoops_context *cxt,
 			     struct persistent_ram_zone ***przs,
@@ -580,15 +614,9 @@ static int ramoops_init_przs(const char *name,
 		goto fail;
 
 	for (i = 0; i < *cnt; i++) {
-		prz_ar[i] = persistent_ram_new(*paddr, zone_sz, sig,
-						  &cxt->ecc_info,
-						  cxt->memtype, flags);
-		if (IS_ERR(prz_ar[i])) {
-			err = PTR_ERR(prz_ar[i]);
-			dev_err(dev, "failed to request %s mem region (0x%zx@0x%llx): %d\n",
-				name, record_size,
-				(unsigned long long)*paddr, err);
-
+		err = __ramoops_init_prz(name, dev, cxt, &prz_ar[i], paddr,
+					 zone_sz, sig, flags, false);
+		if (err) {
 			while (i > 0) {
 				i--;
 				persistent_ram_free(prz_ar[i]);
@@ -596,7 +624,6 @@ static int ramoops_init_przs(const char *name,
 			kfree(prz_ar);
 			goto fail;
 		}
-		*paddr += zone_sz;
 	}
 
 	*przs = prz_ar;
@@ -612,31 +639,7 @@ static int ramoops_init_prz(const char *name,
 			    struct persistent_ram_zone **prz,
 			    phys_addr_t *paddr, size_t sz, u32 sig)
 {
-	if (!sz)
-		return 0;
-
-	if (*paddr + sz - cxt->phys_addr > cxt->size) {
-		dev_err(dev, "no room for %s mem region (0x%zx@0x%llx) in (0x%lx@0x%llx)\n",
-			name, sz, (unsigned long long)*paddr,
-			cxt->size, (unsigned long long)cxt->phys_addr);
-		return -ENOMEM;
-	}
-
-	*prz = persistent_ram_new(*paddr, sz, sig, &cxt->ecc_info,
-				  cxt->memtype, 0);
-	if (IS_ERR(*prz)) {
-		int err = PTR_ERR(*prz);
-
-		dev_err(dev, "failed to request %s mem region (0x%zx@0x%llx): %d\n",
-			name, sz, (unsigned long long)*paddr, err);
-		return err;
-	}
-
-	persistent_ram_zap(*prz);
-
-	*paddr += sz;
-
-	return 0;
+	return __ramoops_init_prz(name, dev, cxt, prz, paddr, sz, sig, 0, true);
 }
 
 static int ramoops_parse_dt_size(struct platform_device *pdev,
-- 
2.11.0