Le 03/09/2020 à 16:22, Christoph Hellwig a écrit :
Stop providing the possibility to override the address space using
set_fs() now that there is no need for that any more.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
-static inline int __access_ok(unsigned long addr, unsigned long size,
- mm_segment_t seg)
+static inline bool __access_ok(unsigned long addr, unsigned long size)
{
- if (addr > seg.seg)
- return 0;
- return (size == 0 || size - 1 <= seg.seg - addr);
+ if (addr >= TASK_SIZE_MAX)
+ return false;
+ return size == 0 || size <= TASK_SIZE_MAX - addr;
}
You don't need to test size == 0 anymore. It used to be necessary
because of the 'size - 1', as size is unsigned.
Now you can directly do
return size <= TASK_SIZE_MAX - addr;
If size is 0, this will always be true (because you already know that
addr is not >= TASK_SIZE_MAX
Christophe
