commit 70ba28f7ab2923d4e36ffc9d5d2e32357353b25c

Author: Lucas A. M. Magalhaes <lamm@linux.ibm.com>

Date:   Thu Jan 16 10:39:12 2020 -0300

    Fix tst-pkey.c pkey_alloc return checks and manual

    This test was failing in some powerpc systems as it was not checking

    for ENOSPC return.

    As said on the Linux man-pages and can be observed by the implementation

    at mm/mprotect.c in the Linux Kernel source.  The syscall pkey_alloc can

    return EINVAL or ENOSPC.  ENOSPC will indicate either that all keys are

    in use or that the kernel does not support pkeys.

    Reviewed-by: Gabriel F. T. Gomes <gabriel@inconstante.net.br>

diff --git a/manual/memory.texi b/manual/memory.texi

index a1435aad1acd3239..4731a38bcc5701e0 100644

--- a/manual/memory.texi

+++ b/manual/memory.texi

@@ -3289,6 +3289,10 @@ in which memory protection keys are disabled.

 @item ENOSPC

 All available protection keys already have been allocated.

+

+The system does not implement memory protection keys or runs in a mode

+in which memory protection keys are disabled.

+

 @end table

 @end deftypefun

diff --git a/sysdeps/unix/sysv/linux/tst-pkey.c b/sysdeps/unix/sysv/linux/tst-pkey.c

index 600b6f0098def773..40d7e9f24dec3e57 100644

--- a/sysdeps/unix/sysv/linux/tst-pkey.c

+++ b/sysdeps/unix/sysv/linux/tst-pkey.c

@@ -199,6 +199,10 @@ do_test (void)

       if (errno == EINVAL)

         FAIL_UNSUPPORTED

           ("CPU does not support memory protection keys: %m");

+      if (errno == ENOSPC)

+        FAIL_UNSUPPORTED

+          ("no keys available or kernel does not support memory"

+           " protection keys");

       FAIL_EXIT1 ("pkey_alloc: %m");

     }

   TEST_COMPARE (pkey_get (keys[0]), 0);