[PATCH v3 3/8] ramoops: Add __ramoops_init_prz() as generic function

From: Nobuhiro Iwamatsu
Date: Tue Oct 18 2016 - 03:16:08 EST


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@xxxxxxxxxxx>
Signed-off-by: Hiraku Toyooka <hiraku.toyooka.gu@xxxxxxxxxxx>
Cc: Anton Vorontsov <anton@xxxxxxxxxx>
Cc: Colin Cross <ccross@xxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Mark Salyzyn <salyzyn@xxxxxxxxxxx>
Cc: Seiji Aguchi <seiji.aguchi.tr@xxxxxxxxxxx>
Cc: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>

V3:
Rebase.
Split patch.
---
fs/pstore/ram.c | 69 ++++++++++++++++++++++++++++++---------------------------
1 file changed, 36 insertions(+), 33 deletions(-)

diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 691680f..4fe27fb 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -404,6 +404,38 @@ static void ramoops_free_przs(struct persistent_ram_zone **przs, int cnt)
kfree(przs);
}

+static int __ramoops_init_prz(struct device *dev, struct ramoops_context *cxt,
+ struct persistent_ram_zone **prz,
+ phys_addr_t *paddr, size_t sz, u32 sig, bool zap)
+{
+ if (!sz)
+ return 0;
+
+ if (*paddr + sz - cxt->phys_addr > cxt->size) {
+ dev_err(dev, "no room for mem region (0x%zx@0x%llx) in (0x%lx@0x%llx)\n",
+ 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);
+ if (IS_ERR(*prz)) {
+ int err = PTR_ERR(*prz);
+
+ dev_err(dev, "failed to request mem region (0x%zx@0x%llx): %d\n",
+ sz, (unsigned long long)*paddr, err);
+ return err;
+ }
+
+ if (zap)
+ persistent_ram_zap(*prz);
+
+ *paddr += sz;
+
+ return 0;
+}
+
static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt,
phys_addr_t *paddr, size_t dump_mem_sz)
{
@@ -430,21 +462,15 @@ static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt,
}

for (i = 0; i < cxt->max_dump_cnt; i++) {
- cxt->przs[i] = persistent_ram_new(*paddr, cxt->record_size, 0,
- &cxt->ecc_info,
- cxt->memtype);
- if (IS_ERR(cxt->przs[i])) {
- err = PTR_ERR(cxt->przs[i]);
- dev_err(dev, "failed to request mem region (0x%zx@0x%llx): %d\n",
- cxt->record_size, (unsigned long long)*paddr, err);
-
+ err = __ramoops_init_prz(dev, cxt, &cxt->przs[i], paddr,
+ cxt->record_size, 0, false);
+ if (err) {
while (i > 0) {
i--;
persistent_ram_free(cxt->przs[i]);
}
goto fail_prz;
}
- *paddr += cxt->record_size;
}

return 0;
@@ -459,30 +485,7 @@ static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt,
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 mem region (0x%zx@0x%llx) in (0x%lx@0x%llx)\n",
- 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);
- if (IS_ERR(*prz)) {
- int err = PTR_ERR(*prz);
-
- dev_err(dev, "failed to request mem region (0x%zx@0x%llx): %d\n",
- sz, (unsigned long long)*paddr, err);
- return err;
- }
-
- persistent_ram_zap(*prz);
-
- *paddr += sz;
-
- return 0;
+ return __ramoops_init_prz(dev, cxt, prz, paddr, sz, sig, true);
}

static int ramoops_parse_dt_size(struct platform_device *pdev,
--
2.9.3