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maccess: rename probe_kernel_address to get_kernel_nofault

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Better describe what this helper does, and match the naming of
copy_from_kernel_nofault.

Also switch the argument order around, so that it acts and looks
like get_user().

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2020-06-17 09:37:55 +02:00 • committed by Linus Torvalds
parent c0ee37e85e
commit 25f12ae45f
20 changed files with 40 additions and 40 deletions
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10
include/linux/uaccess.h
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@ -318,14 +318,14 @@ long strncpy_from_user_nofault(char *dst, const void __user *unsafe_addr,
long strnlen_user_nofault(const void __user *unsafe_addr, long count);
/**
* probe_kernel_address(): safely attempt to read from a location
* @addr: address to read from
* @retval: read into this variable
* get_kernel_nofault(): safely attempt to read from a location
* @val: read into this variable
* @ptr: address to read from
*
* Returns 0 on success, or -EFAULT.
*/
#define probe_kernel_address(addr, retval) \
copy_from_kernel_nofault(&retval, addr, sizeof(retval))
#define get_kernel_nofault(val, ptr) \
copy_from_kernel_nofault(&(val), (ptr), sizeof(val))
#ifndef user_access_begin
#define user_access_begin(ptr,len) access_ok(ptr, len)