linux-kernel - Re: [PATCH 1/2] ibmebus: dynamic addiiton/removal of adapters, uevent, root device based on struct device

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Date:	Tue, 06 Mar 2007 15:51:42 -0600
From:	John Rose <johnrose@...tin.ibm.com>
To:	Hoang-Nam Nguyen <hnguyen@...ux.vnet.ibm.com>
Cc:	Paul Mackerras <paulus@...ba.org>,
	External List <linuxppc-dev@...abs.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Me Notes <johnrose@...ibm.com>,
	Joaquim Fenkes <fenkes@...ibm.com>,
	Paul Mackerras <pmac@....ibm.com>, stefan.roscher@...ibm.com,
	Nathan Fontenot <nfont@...tin.ibm.com>
Subject: Re: [PATCH 1/2] ibmebus: dynamic addiiton/removal of adapters,
	uevent, root device based on struct device

> This adds two sysfs attributes to /sys/bus/ibmebus which can
> be used to notify the ebus driver of added / removed ebus
> devices in the OF device tree.

We are seeing several build errors when attempting to apply this to
2.6.21-rc2:

CC arch/powerpc/kernel/ibmebus.o
arch/powerpc/kernel/ibmebus.c: In function "ibmebus_register_device_common":
arch/powerpc/kernel/ibmebus.c:192: warning: ignoring return value of "device_create_file", declared with attribute warn_unused_result
arch/powerpc/kernel/ibmebus.c: At top level:
arch/powerpc/kernel/ibmebus.c:373: error: "of_device_uevent" undeclared here (not in a function)
arch/powerpc/kernel/ibmebus.c: In function "ibmebus_store_probe":
arch/powerpc/kernel/ibmebus.c:399: error: assignment of read-only location
arch/powerpc/kernel/ibmebus.c:401: error: assignment of read-only location
arch/powerpc/kernel/ibmebus.c: In function "ibmebus_store_remove":
arch/powerpc/kernel/ibmebus.c:434: error: assignment of read-only location
arch/powerpc/kernel/ibmebus.c:436: error: assignment of read-only location
arch/powerpc/kernel/ibmebus.c: In function "ibmebus_bus_init":
arch/powerpc/kernel/ibmebus.c:474: warning: ignoring return value of "bus_create_file", declared with attribute warn_unused_result
arch/powerpc/kernel/ibmebus.c:475: warning: ignoring return value of "bus_create_file", declared with attribute warn_unused_result
make[1]: *** [arch/powerpc/kernel/ibmebus.o] Error 1
make: *** [arch/powerpc/kernel] Error 2
make: *** Waiting for unfinished jobs....
Here is a sample error from the patch referenced above:
+static ssize_t ibmebus_store_probe(struct bus_type *bus,
+                                  const char *buf, size_t count)
+{
+       struct device_node *dn = NULL;
+       struct ibmebus_dev *dev;
+       char *loc_code;
+
+       buf[count] = '\0';

The "buf" variable is declared const, and then immediately written to.

Thanks-
John

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