Re: [GIT PULL] x86/build changes for v4.17

Linus Torvalds writes: (Summary) wrote:

[...]

keep our compiler folks (halfway) sane?
I don't know if clang actually already gets this right or not, but as an example of a case where we have a semantic difference between "is this a constant or not", a much simpler case is in this a constant or not", a much simpler case is in - arch/x86/include/asm/uaccess.h:
- arch/x86/include/asm/uaccess.h:

  /*
   * Test whether a block of memory is a valid user space address.
   */
  static inline bool __chk_range_not_ok(unsigned long addr, unsigned
long size, unsigned long limit)
  {
        /*
         * If we have used "sizeof()" for the size,
         * we know it won't overflow the limit (but
         * it might overflow the 'addr', so it's
         * important to subtract the size from the
         * limit, not add it to the address).