提交 d7fc9d77 编写于 作者: Y Yazen Ghannam 提交者: Borislav Petkov

EDAC: Add routine to check if MC devices list is empty

We need to know if any MC devices have been allocated.
Signed-off-by: NYazen Ghannam <Yazen.Ghannam@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1485537863-2707-7-git-send-email-Yazen.Ghannam@amd.com
[ Prettify text. ]
Signed-off-by: NBorislav Petkov <bp@suse.de>
上级 df64636f
......@@ -453,6 +453,20 @@ void edac_mc_free(struct mem_ctl_info *mci)
}
EXPORT_SYMBOL_GPL(edac_mc_free);
bool edac_has_mcs(void)
{
bool ret;
mutex_lock(&mem_ctls_mutex);
ret = list_empty(&mc_devices);
mutex_unlock(&mem_ctls_mutex);
return !ret;
}
EXPORT_SYMBOL_GPL(edac_has_mcs);
/* Caller must hold mem_ctls_mutex */
static struct mem_ctl_info *__find_mci_by_dev(struct device *dev)
{
......
......@@ -148,6 +148,15 @@ extern int edac_mc_add_mc_with_groups(struct mem_ctl_info *mci,
*/
extern void edac_mc_free(struct mem_ctl_info *mci);
/**
* edac_has_mcs() - Check if any MCs have been allocated.
*
* Returns:
* True if MC instances have been registered successfully.
* False otherwise.
*/
extern bool edac_has_mcs(void);
/**
* edac_mc_find() - Search for a mem_ctl_info structure whose index is @idx.
*
......
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