![]() The function prototype mismatches in call stack:
[<ffffffff81494268>] print_block_size+0x58/0x60
[<ffffffff81487e3f>] sysdev_class_show+0x1f/0x30
[<ffffffff811d629b>] sysfs_read_file+0xcb/0x1f0
[<ffffffff81176328>] vfs_read+0xc8/0x180
Due to prototype mismatch, print_block_size() will sprintf() into
*attribute instead of *buf, hence user space will read the initial
zeros from *buf:
$ hexdump /sys/devices/system/memory/block_size_bytes
0000000 0000 0000 0000 0000
0000008
After patch:
cat /sys/devices/system/memory/block_size_bytes
0x8000000
This complements commits c29af9636 and
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.. | ||
power | ||
attribute_container.c | ||
base.h | ||
bus.c | ||
class.c | ||
core.c | ||
cpu.c | ||
dd.c | ||
devres.c | ||
devtmpfs.c | ||
dma-coherent.c | ||
dma-mapping.c | ||
driver.c | ||
firmware.c | ||
firmware_class.c | ||
hypervisor.c | ||
init.c | ||
iommu.c | ||
isa.c | ||
Kconfig | ||
Makefile | ||
map.c | ||
memory.c | ||
module.c | ||
node.c | ||
platform.c | ||
sys.c | ||
topology.c | ||
transport_class.c |