tom.leiming@xxxxxxxxx writes: > From: Ming Lei <tom.leiming@xxxxxxxxx> > > This patch uses kmalloc(size,GFP_ATOMIC) instead of kmalloc(size,GFP_KERNEL) > to allocate memory for instance of struct power_state in pwrdms_setup(), > since it may be called by pwrdm_for_each() with irq disabled. > > It is a easy fix for the following lockdep warning caused by > kmalloc(size,GFP_KERNEL) in pwrdms_setup(): > > Power Management for TI OMAP3. > ------------[ cut here ]------------ > WARNING: at kernel/lockdep.c:2282 lockdep_trace_alloc+0xe8/0xfc() > Modules linked in: > [<c0032ccc>] (unwind_backtrace+0x0/0xec) from [<c0056934>] (warn_slowpath_common+0x48/0x60) > [<c0056934>] (warn_slowpath_common+0x48/0x60) from [<c007da10>] (lockdep_trace_alloc+0xe8/0xfc) > [<c007da10>] (lockdep_trace_alloc+0xe8/0xfc) from [<c00cd9bc>] (kmem_cache_alloc+0x28/0x178) > [<c00cd9bc>] (kmem_cache_alloc+0x28/0x178) from [<c000f184>] (pwrdms_setup+0x30/0xf8) > [<c000f184>] (pwrdms_setup+0x30/0xf8) from [<c00381c4>] (pwrdm_for_each+0x64/0x84) > [<c00381c4>] (pwrdm_for_each+0x64/0x84) from [<c000ef60>] (omap3_pm_init+0x3f4/0x5ac) > [<c000ef60>] (omap3_pm_init+0x3f4/0x5ac) from [<c002c2c0>] (do_one_initcall+0x30/0x1d4) > [<c002c2c0>] (do_one_initcall+0x30/0x1d4) from [<c00088d8>] (kernel_init+0xa4/0x118) > [<c00088d8>] (kernel_init+0xa4/0x118) from [<c002ddf8>] (kernel_thread_exit+0x0/0x8) > ---[ end trace 1e06f8d97dc5a19b ]--- > > --- > This patch is against linux-2.6.31-rc7. > > Signed-off-by: Ming Lei <tom.leiming@xxxxxxxxx> Looks good, I'll queue in my fixes for 2.6.32 queue. Kevin > --- > arch/arm/mach-omap2/pm34xx.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c > index 488d595..d67b781 100644 > --- a/arch/arm/mach-omap2/pm34xx.c > +++ b/arch/arm/mach-omap2/pm34xx.c > @@ -665,7 +665,7 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm) > if (!pwrdm->pwrsts) > return 0; > > - pwrst = kmalloc(sizeof(struct power_state), GFP_KERNEL); > + pwrst = kmalloc(sizeof(struct power_state), GFP_ATOMIC); > if (!pwrst) > return -ENOMEM; > pwrst->pwrdm = pwrdm; > -- > 1.6.0.GIT -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
