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__CLEAR_USER(9) Memory Management in Linux __CLEAR_USER(9)

NAME

__clear_user - Zero a block of memory in user space, with less checking.

SYNOPSIS

unsigned long __clear_user(void __user * to, unsigned long n);

ARGUMENTS

to
Destination address, in user space.
n
Number of bytes to zero.

DESCRIPTION

Zero a block of memory in user space. Caller must check the specified block with access_ok before calling this function.
Returns number of bytes that could not be cleared. On success, this will be zero.

COPYRIGHT

February 2017 Kernel Hackers Manual 3.16