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    Subject[PATCH 10/10] Allow reading/writing all memory through /dev/mem
    Date
    With all pieces in place, I can now change the type of the physical
    address pointer and get access to all memory.

    Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
    ---
    drivers/char/mem.c | 4 ++--
    1 files changed, 2 insertions(+), 2 deletions(-)

    diff --git a/drivers/char/mem.c b/drivers/char/mem.c
    index cbbaf36..bc16ab7 100644
    --- a/drivers/char/mem.c
    +++ b/drivers/char/mem.c
    @@ -93,7 +93,7 @@ void __weak unxlate_dev_mem_ptr(phys_addr_t phys, void *addr)
    static ssize_t read_mem(struct file *file, char __user *buf,
    size_t count, loff_t *ppos)
    {
    - unsigned long p = *ppos;
    + phys_addr_t p = *ppos;
    ssize_t read, sz;
    char *ptr;

    @@ -153,7 +153,7 @@ static ssize_t read_mem(struct file *file, char __user *buf,
    static ssize_t write_mem(struct file *file, const char __user *buf,
    size_t count, loff_t *ppos)
    {
    - unsigned long p = *ppos;
    + phys_addr_t p = *ppos;
    ssize_t written, sz;
    unsigned long copied;
    void *ptr;
    --
    1.7.3.4

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