![]() Patch from Nicolas Pitre Quoting RMK: |pte_write() just says that the page _may_ be writable. It doesn't say |that the MMU is programmed to allow writes. If pte_dirty() doesn't |return true, that means that the page is _not_ writable from userspace. |If you write to it from kernel mode (without using put_user) you'll |bypass the MMU read-only protection and may end up writing to a page |owned by two separate processes. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> |
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.. | ||
apm.c | ||
armksyms.c | ||
arthur.c | ||
asm-offsets.c | ||
bios32.c | ||
calls.S | ||
compat.c | ||
compat.h | ||
debug.S | ||
dma-isa.c | ||
dma.c | ||
ecard.c | ||
entry-armv.S | ||
entry-common.S | ||
entry-header.S | ||
fiq.c | ||
head.S | ||
init_task.c | ||
io.c | ||
irq.c | ||
isa.c | ||
iwmmxt.S | ||
Makefile | ||
module.c | ||
process.c | ||
ptrace.c | ||
ptrace.h | ||
semaphore.c | ||
setup.c | ||
signal.c | ||
signal.h | ||
smp.c | ||
sys_arm.c | ||
sys_oabi-compat.c | ||
time.c | ||
traps.c | ||
vmlinux.lds.S |