Argh! Kill latest (hopefuly) remnants of core/final gcc versions.
1 Date: Sun, 20 Mar 2005 20:26:02 -0800
2 From: Richard Henderson <rth@twiddle.net>
3 To: Andrew Morton <akpm@osdl.org>
4 Cc: Dan Kegel <dank@kegel.com>, jbglaw@lug-owl.de,
5 linux-kernel@vger.kernel.org, torvalds@osdl.org
6 Subject: Re: 2.6.11.3 build problem in arch/alpha/kernel/srcons.c with gcc-4.0
7 Message-ID: <20050321042602.GA3795@twiddle.net>
8 Mail-Followup-To: Andrew Morton <akpm@osdl.org>, Dan Kegel <dank@kegel.com>,
9 jbglaw@lug-owl.de, linux-kernel@vger.kernel.org, torvalds@osdl.org
10 References: <423E238F.3030805@kegel.com> <20050320190352.65cc1396.akpm@osdl.org>
12 Content-Type: text/plain; charset=us-ascii
13 Content-Disposition: inline
14 In-Reply-To: <20050320190352.65cc1396.akpm@osdl.org>
15 User-Agent: Mutt/1.4.1i
17 On Sun, Mar 20, 2005 at 07:03:52PM -0800, Andrew Morton wrote:
18 > Dan Kegel <dank@kegel.com> wrote:
20 > > Anyone with an alpha care to suggest a fix for this?
22 > > arch/alpha/kernel/srmcons.c: In function 'srmcons_open':
23 > > arch/alpha/kernel/srmcons.c:196: warning: 'srmconsp' may be used uninitialized in this function
24 > > make[1]: *** [arch/alpha/kernel/srmcons.o] Error 1
25 > > make: *** [arch/alpha/kernel] Error 2
27 > > I get this when building the 2.6.11.3 kernel with a recent gcc-4.0 snapshot.
30 > It's beyond gcc's ability to figure out that the code is OK. Options would
31 > be to disable -Werror, or to artificially initialise that variable.
35 Note that even with a _raw_read_trylock implementation, smp still
36 doesn't work. Everything that init spawns dies immediately. I
37 havn't had a chance to find out why yet...
39 [ Note: deleted changes to smp.c, since they didn't apply cleanly
40 to 2.6.11.3 (the function had moved, I guess), and they seemed unrelated.]
46 You can import this changeset into BK by piping this whole message to:
47 '| bk receive [path to repository]' or apply the patch as usual.
49 ===================================================================
52 ChangeSet@1.2289, 2005-03-20 12:29:41-08:00, rth@kanga.twiddle.home
53 [ALPHA] Elimitate two warnings from gcc4.
56 smp.c | 43 -------------------------------------------
57 srmcons.c | 27 ++++++++++-----------------
58 2 files changed, 10 insertions(+), 60 deletions(-)
61 diff -Nru a/arch/alpha/kernel/srmcons.c b/arch/alpha/kernel/srmcons.c
62 --- a/arch/alpha/kernel/srmcons.c 2005-03-20 20:23:28 -08:00
63 +++ b/arch/alpha/kernel/srmcons.c 2005-03-20 20:23:28 -08:00
68 - spin_lock_irqsave(&srmconsp_lock, flags);
71 - if (srmconsp != NULL) {
75 + if (srmconsp == NULL) {
76 + spin_lock_irqsave(&srmconsp_lock, flags);
78 srmconsp = kmalloc(sizeof(*srmconsp), GFP_KERNEL);
79 - if (srmconsp == NULL) {
80 + if (srmconsp == NULL)
84 + srmconsp->tty = NULL;
85 + spin_lock_init(&srmconsp->lock);
86 + init_timer(&srmconsp->timer);
89 - srmconsp->tty = NULL;
90 - spin_lock_init(&srmconsp->lock);
91 - init_timer(&srmconsp->timer);
96 - spin_unlock_irqrestore(&srmconsp_lock, flags);
97 + spin_unlock_irqrestore(&srmconsp_lock, flags);
105 ===================================================================
108 This BitKeeper patch contains the following changesets:
110 ## Wrapped with gzip_uu ##
113 M'XL( $!,/D( [56[V_;-A#]+/X5!Q38FFV628KZY<!!TJ98BP9;D"&?BL)@
114 M),H6+%$:2=DQIOWO)>4XSH8D1KK%-F#@>'J\]^[>V6_@6@LU\919H#?PL=%F
115 MXG$E?+,N\[P2OA3&QJ^:QL;'BZ868YLY?O=YS&_;$?4C9$\ON<D6L!)*3SSB
116 M!_<1LVG%Q+OZ\.OUQ=D50M,IO%]P.1=_" /3*3*-6O$JUZ?<+*I&^D9QJ6MA
117 MN)\U=7^?VE.,J7V') YP&/4DPBSN,Y(3PAD1.:8LB=@>3:P:O]%YY3=J_D^4
118 M$ <DH4&0!LRBL"A YT!\2I,4<#C&P9AB('1"TPDC(YQ,, 9+]G1I(?B]($X#
119 M^)G""*-W\/]2>(\R^')V<?GQ["M\J,JZ--P(,.L&UES)4LXU%*JI89YES$>?
120 M@82,8'2Y5Q6-7OA""'.,3AZA:?O><Y4MQKQJ%WR\%$J*:JQ5G352^YEC%&!"
121 ML664!%%/+:^PCW-:I 7)XUSDE*;Q$_(= K9]<FK1E(0]HPPS6^'S2C\"6+=;
122 ML#O=&::T#^*8QGU*;D@>)3BWJA?I3?Z"*G>@#RND49R&PW0_0\O-^RN)C,R\
123 MNCVM2MD9U<CRUL_%EYU:7P]+32@A$644]RQ,*!TL0>B_#4'" X8@&$8D?A5+
124 M7(FU*JT1[@J?S869M:I<67/,M%%=9D!W;MTLN(&?6@VE!EZM^4:#>] (Z<RR
125 M':3?8:36P\<._^5S'?L.+YV3*(88?;*4@"*O+.#M'5QK^P^_75]<',%?R/-T
126 M6\I9U63+6:G^U'PEWOZP2QS"OT!1\;D^.K:0<03$0;HO[W%,EY5LLQ)@-DM4
127 M6@P7>;O<T8DQ&]CF'P\'^Q)D:?;WCTY<\&C(<2<S4]9"/3P? D-I"8'$7IHD
128 MCNT6L9,[6DIH.PI/,_/^=H^FCI7KV737WO;X*2\Y\QW^W?A/JP#==')YJDVG
129 M+=HA'SU8!H1AS!@-^X"F=LJ<AT+R8@]9"['@52QT+BKA'%2W,]-):YML(?+.
130 M[HSY,90&\D9H^:,!GIF.5]4&6J&*1M7 Y08Z+8JNLB!%)S-3-M)%:]M:YZKM
131 I\COL*J?5=SG*3;1=2J%3<?]?PY:?+7573PFE(L5)@+X!A'U=W,@(