Re: [PATCH] mm/pkeys: generate pkey system call code only if ARCH_HAS_PKEYS is selected

[Dave Hansen <dave.hansen@linux.intel.com>]

On 11/14/2016 03:12 AM, Heiko Carstens wrote:
> Having code for the pkey_mprotect, pkey_alloc and pkey_free system
> calls makes only sense if ARCH_HAS_PKEYS is selected. If not selected
> these system calls will always return -ENOSPC or -EINVAL.
> 
> To simplify things and have less code generate the pkey system call
> code only if ARCH_HAS_PKEYS is selected.
> 
> For architectures which have already wired up the system calls, but do
> not select ARCH_HAS_PKEYS this will result in less generated code and
> a different return code: the three system calls will now always return
> -ENOSYS, using the cond_syscall mechanism.
> 
> For architectures which have not wired up the system calls less
> unreachable code will be generated.
> 
> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

This is fine with me.  FWIW:

Acked-by: Dave Hansen <dave.hansen@linux.intel.com>

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>