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| author | Julia Lawall <julia@diku.dk> | 2009-09-21 17:08:55 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-09-30 21:46:59 +0200 |
| commit | b265158399ad825411f3d471cacc46b00d0e4841 (patch) | |
| tree | c2ce0ecf69824c5f18f631ca24a61ff7c2fd56ea /arch/mips | |
| parent | 742db5d1085df97354ce65daf9b6b657696d5268 (diff) | |
| download | blackbird-op-linux-b265158399ad825411f3d471cacc46b00d0e4841.tar.gz blackbird-op-linux-b265158399ad825411f3d471cacc46b00d0e4841.zip | |
MIPS: SMTC: Remove duplicate structure field initialization
The definition of the irq_ipi structure has two initializations of the
flags field. This combines them.
[Ralf: The issue was originally introduced by commit
be4894196d79455f420dd7bb78be7dc73bec115c (linux-mips.org) rsp.
033890b084adfa367c544864451d7730552ce8bf (kernel.org). The original
intention of the code was to initialize .flags with both flags ored together.
The broken C code as actually implemented will be compiled by an equally
broken gcc to use only the last initialization, that is IRQF_PERCPU
which means this turned into an SMTC bug for 2.6.23 and newer.]
The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@r@
identifier I, s, fld;
position p0,p;
expression E;
@@
struct I s =@p0 { ... .fld@p = E, ...};
@s@
identifier I, s, r.fld;
position r.p0,p;
expression E;
@@
struct I s =@p0 { ... .fld@p = E, ...};
@script:python@
p0 << r.p0;
fld << r.fld;
ps << s.p;
pr << r.p;
@@
if int(ps[0].line)!=int(pr[0].line) or int(ps[0].column)!=int(pr[0].column):
cocci.print_main(fld,p0)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/kernel/smtc.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c index 67153a0dc267..4d181df44a40 100644 --- a/arch/mips/kernel/smtc.c +++ b/arch/mips/kernel/smtc.c @@ -1098,9 +1098,8 @@ static void ipi_irq_dispatch(void) static struct irqaction irq_ipi = { .handler = ipi_interrupt, - .flags = IRQF_DISABLED, - .name = "SMTC_IPI", - .flags = IRQF_PERCPU + .flags = IRQF_DISABLED | IRQF_PERCPU, + .name = "SMTC_IPI" }; static void setup_cross_vpe_interrupts(unsigned int nvpe) |
