parisc: Update comments in syscall.S regarding wide userland

We do support running 64-bit userspace processes, although there isn't
yet full gcc and glibc support. Anyway, fix the comments to reflect the
reality.

Signed-off-by: Helge Deller <deller@gmx.de>

1 files changed, 3 insertions, 10 deletions

diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index be451766e9d0..f453997a7b8f 100644
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -108,12 +108,8 @@ linux_gateway_entry:
         mtsp    %r0,%sr6                        /* get kernel space into sr6 */
 
 #ifdef CONFIG_64BIT
-        /* for now we can *always* set the W bit on entry to the syscall
-         * since we don't support wide userland processes.  We could
-         * also save the current SM other than in r0 and restore it on
-         * exit from the syscall, and also use that value to know
-         * whether to do narrow or wide syscalls. -PB
-         */
+        /* Store W bit on entry to the syscall in case it's a wide userland
+         * process. */
         ssm     PSW_SM_W, %r1
         extrd,u %r1,PSW_W_BIT,1,%r1
         /* sp must be aligned on 4, so deposit the W bit setting into
@@ -478,16 +474,13 @@ tracesys_sigexit:
 lws_start:
 
 #ifdef CONFIG_64BIT
-        /* FIXME: If we are a 64-bit kernel just
-         *        turn this on unconditionally.
-         */
         ssm     PSW_SM_W, %r1
         extrd,u %r1,PSW_W_BIT,1,%r1
         /* sp must be aligned on 4, so deposit the W bit setting into
          * the bottom of sp temporarily */
         or,ev   %r1,%r30,%r30
 
-        /* Clip LWS number to a 32-bit value always */
+        /* Clip LWS number to a 32-bit value for 32-bit processes */
         depdi   0, 31, 32, %r20
 #endif