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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¶
| March 2017 | Kernel Hackers Manual 4.10 |