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author | Geert Uytterhoeven <geert@linux-m68k.org> | 2013-06-29 08:40:20 (GMT) |
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committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2013-11-26 10:09:03 (GMT) |
commit | c293738e6d8dfb9c941759855b5161fde449644d (patch) | |
tree | 3c2d4b2041af3e2fe5a8a4702cdfe49fca3e1f7f /drivers | |
parent | 1ea636eb68322198e08aebdede141244d98e8299 (diff) | |
download | linux-c293738e6d8dfb9c941759855b5161fde449644d.tar.xz |
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')
-rw-r--r-- | drivers/zorro/zorro.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/zorro/zorro.c b/drivers/zorro/zorro.c index 858c971..10c7f77 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); |