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authorGeert Uytterhoeven <geert@linux-m68k.org>2013-06-29 10:40:20 +0200
committerGeert Uytterhoeven <geert@linux-m68k.org>2013-11-26 11:09:03 +0100
commitc293738e6d8dfb9c941759855b5161fde449644d (patch)
tree3c2d4b2041af3e2fe5a8a4702cdfe49fca3e1f7f /drivers/zorro
parent1ea636eb68322198e08aebdede141244d98e8299 (diff)
downloadlinux-stericsson-c293738e6d8dfb9c941759855b5161fde449644d.tar.gz
zorro: Do not allocate zorro_autocon[] statically
Currently the array of Zorro devices is allocated statically, wasting up to 4.5 KiB when running an Amiga or multi-platform kernel on a machine with no or a handful of Zorro expansion cards. Convert it to conditional dynamic memory allocation to fix this. amiga_parse_bootinfo() still needs to store some information about the detected Zorro devices, at a time even the bootmem allocator is not yet available. This is now handled using a much smaller array (typically less than 0.5 KiB), which is __initdata and thus freed later. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'drivers/zorro')
-rw-r--r--drivers/zorro/zorro.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/zorro/zorro.c b/drivers/zorro/zorro.c
index 858c9714b2f3..10c7f77aec08 100644
--- a/drivers/zorro/zorro.c
+++ b/drivers/zorro/zorro.c
@@ -29,7 +29,8 @@
*/
unsigned int zorro_num_autocon;
-struct zorro_dev zorro_autocon[ZORRO_NUM_AUTO];
+struct zorro_dev_init zorro_autocon_init[ZORRO_NUM_AUTO] __initdata;
+struct zorro_dev *zorro_autocon;
/*
@@ -38,6 +39,7 @@ struct zorro_dev zorro_autocon[ZORRO_NUM_AUTO];
struct zorro_bus {
struct device dev;
+ struct zorro_dev devices[0];
};
@@ -125,16 +127,20 @@ static struct resource __init *zorro_find_parent_resource(
static int __init amiga_zorro_probe(struct platform_device *pdev)
{
struct zorro_bus *bus;
+ struct zorro_dev_init *zi;
struct zorro_dev *z;
struct resource *r;
unsigned int i;
int error;
/* Initialize the Zorro bus */
- bus = kzalloc(sizeof(*bus), GFP_KERNEL);
+ bus = kzalloc(sizeof(*bus) +
+ zorro_num_autocon * sizeof(bus->devices[0]),
+ GFP_KERNEL);
if (!bus)
return -ENOMEM;
+ zorro_autocon = bus->devices;
bus->dev.parent = &pdev->dev;
dev_set_name(&bus->dev, "zorro");
error = device_register(&bus->dev);
@@ -151,15 +157,22 @@ static int __init amiga_zorro_probe(struct platform_device *pdev)
/* First identify all devices ... */
for (i = 0; i < zorro_num_autocon; i++) {
+ zi = &zorro_autocon_init[i];
z = &zorro_autocon[i];
+
+ z->rom = zi->rom;
z->id = (z->rom.er_Manufacturer<<16) | (z->rom.er_Product<<8);
if (z->id == ZORRO_PROD_GVP_EPC_BASE) {
/* GVP quirk */
- unsigned long magic = zorro_resource_start(z)+0x8000;
+ unsigned long magic = zi->boardaddr + 0x8000;
z->id |= *(u16 *)ZTWO_VADDR(magic) & GVP_PRODMASK;
}
+ z->slotaddr = zi->slotaddr;
+ z->slotsize = zi->slotsize;
sprintf(z->name, "Zorro device %08x", z->id);
zorro_name_device(z);
+ z->resource.start = zi->boardaddr;
+ z->resource.end = zi->boardaddr + zi->boardsize - 1;
z->resource.name = z->name;
r = zorro_find_parent_resource(pdev, z);
error = request_resource(r, &z->resource);