amd64/186291: Compilation fail when "device pst" in kernel config on amd64.

John Baldwin jhb at
Thu Feb 6 19:30:01 UTC 2014

The following reply was made to PR amd64/186291; it has been noted by GNATS.

From: John Baldwin <jhb at>
To: freebsd-amd64 at
Cc: Ivan Chetyrkin <frice at>,
 freebsd-gnats-submit at
Subject: Re: amd64/186291: Compilation fail when "device pst" in kernel config on amd64.
Date: Thu, 6 Feb 2014 13:22:52 -0500

 On Friday, January 31, 2014 2:00:27 am Ivan Chetyrkin wrote:
 > >Number:         186291
 > >Category:       amd64
 > >Synopsis:       Compilation fail when "device pst" in kernel config on 
 > >Confidential:   no
 > >Severity:       non-critical
 > >Priority:       low
 > >Responsible:    freebsd-amd64
 > >State:          open
 > >Quarter:        
 > >Keywords:       
 > >Date-Required:
 > >Class:          sw-bug
 > >Submitter-Id:   current-users
 > >Arrival-Date:   Fri Jan 31 07:10:00 UTC 2014
 > >Closed-Date:
 > >Last-Modified:
 > >Originator:     Ivan Chetyrkin
 > >Release:        10.0-STABLE
 > >Organization:
 > >Environment:
 > FreeBSD v64.devel.local 10.0-STABLE FreeBSD 10.0-STABLE #0: Thu Jan 30 
 21:31:03 UTC 2014     root at v64.devel.local:/usr/obj/usr/src/sys/VBOX64  amd64
 > >Description:
 > When trying to compile my own kernel with "device pst" in configuration 
 file, process fail with message:
 > cc  -c -O2 -pipe -fno-strict-aliasing  -std=c99 -g -Wall -Wredundant-decls -
 Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -
 Winline -Wcast-qual  -Wundef -Wno-pointer-sign -fformat-extensions  -Wmissing-
 include-dirs -fdiagnostics-show-option  -Wno-error-tautological-compare -Wno-
 error-empty-body  -Wno-error-parentheses-equality  -nostdinc  -I. -
 I/usr/src/sys -I/usr/src/sys/contrib/altq -I/usr/src/sys/contrib/libfdt -
 D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h  -fno-omit-frame-
 pointer -mno-omit-leaf-frame-pointer -mno-aes -mno-avx -mcmodel=kernel -mno-
 red-zone -mno-mmx -mno-sse -msoft-float  -fno-asynchronous-unwind-tables -
 ffreestanding -fstack-protector -Werror  /usr/src/sys/dev/pst/pst-iop.c
 > /usr/src/sys/dev/pst/pst-iop.c:197:3: error: cast to 'void (*)(struct 
 iop_softc *, u_int32_t, struct i2o_single_reply *)' from smaller integer type 
 'u_int32_t' (aka 'unsigned int')
 >       [-Werror,-Wint-to-pointer-cast]
 >         ((void (*)(struct iop_softc *, u_int32_t, struct i2o_single_reply 
 >          ^
 > /usr/src/sys/dev/pst/pst-iop.c:419:9: error: cast to 'struct iop_request *' 
 from smaller integer type 'u_int32_t' (aka 'unsigned int') [-Werror,-Wint-to-
 >         (struct iop_request *)reply->transaction_context;
 >         ^
 > 2 errors generated.
 > As we see from /usr/src/sys/dev/pst/pst-iop.h, initiator_context and 
 transaction_context fields of driver message struct are declared as u_int32_t, 
 which doesn't match pointer size on 64-bit processor.
 > >How-To-Repeat:
 > On amd64 machine include
 > device pst
 > in your config file and try compile kernel.
 > >Fix:
 > The controller is very old hardware and one of fix may be exclude it from 
 available devices on amd64 platform.
 Yes, this driver is not supported on amd64.  Do you need it to work?  You 
 would need to implement a cookie hash table of some sort to map transaction 
 context IDs to request pointers.  If you do not need it, we should probably
 disable it on amd64 as no one else has asked about it.
 John Baldwin

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