This fragment of ia64 code calculates the address of a user space
location, starting from a kernel derived (i.e. not user supplied)
pointer. put_user() has to be used because the code is running in
interrupt context and the calculated target address may be invalid or
paged out.
func (long regno, unsigned long *contents)
{
unsigned long i, *bsp;
mm_segment_t old_fs;
bsp = <expression involving only kernel variables>;
old_fs = set_fs(KERNEL_DS);
for (i = 0; i < (regno - 32); ++i)
bsp = ia64_rse_skip_regs(bsp, 1);
put_user(*contents, bsp);
set_fs(old_fs);
}
sparse is complaining that the second parameter to put_user() is not
marked as __user. How do I tell sparse to ignore this case? Marking
bsp as __user does not work, sparse then complains about incorrect type
in assignment (different address spaces).
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
