pstore: Allow the user to explicitly choose a backend (dee28e72) · Commits · 戴 / test

Documentation/ABI/testing/pstore

+6 −0

Original line number	Diff line number	Diff line
		@@ -39,3 +39,9 @@ Description: Generic interface to platform dependent persistent storage.
		multiple) files based on the record size of the underlying
		persistent storage until at least this amount is reached.
		Default is 10 Kbytes.

		Pstore only supports one backend at a time. If multiple
		backends are available, the preferred backend may be
		set by passing the pstore.backend= argument to the kernel at
		boot time.

+2 −0

Original line number	Diff line number	Diff line
		@@ -2151,6 +2151,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
		[HW,MOUSE] Controls Logitech smartscroll autorepeat.
		0 = disabled, 1 = enabled (default).

		pstore.backend= Specify the name of the pstore backend to use

		pt. [PARIDE]
		See Documentation/blockdev/paride.txt.

+11 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,8 @@
		static DEFINE_SPINLOCK(pstore_lock);
		static struct pstore_info *psinfo;

		static char *backend;

		/* How much of the console log to snapshot */
		static unsigned long kmsg_bytes = 10240;

		@@ -131,6 +133,12 @@ int pstore_register(struct pstore_info *psi)
		spin_unlock(&pstore_lock);
		return -EBUSY;
		}

		if (backend && strcmp(backend, psi->name)) {
		spin_unlock(&pstore_lock);
		return -EINVAL;
		}

		psinfo = psi;
		spin_unlock(&pstore_lock);

		@@ -208,3 +216,6 @@ int pstore_write(enum pstore_type_id type, char *buf, size_t size)
		return 0;
		}
		EXPORT_SYMBOL_GPL(pstore_write);

		module_param(backend, charp, 0444);
		MODULE_PARM_DESC(backend, "Pstore backend to use");