Messages in this thread | | | Subject | Re: [PATCH 08/15] powerpc/watchpoint: Disable all available watchpoints when !dawr_force_enable | From | Christophe Leroy <> | Date | Tue, 17 Mar 2020 11:35:22 +0100 |
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Le 09/03/2020 à 09:57, Ravi Bangoria a écrit : > Instead of disabling only first watchpoint, disable all available > watchpoints while clearing dawr_force_enable. > > Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> > --- > arch/powerpc/kernel/dawr.c | 10 +++++++--- > 1 file changed, 7 insertions(+), 3 deletions(-) > > diff --git a/arch/powerpc/kernel/dawr.c b/arch/powerpc/kernel/dawr.c > index 311e51ee09f4..5c882f07ac7d 100644 > --- a/arch/powerpc/kernel/dawr.c > +++ b/arch/powerpc/kernel/dawr.c > @@ -50,9 +50,13 @@ int set_dawr(struct arch_hw_breakpoint *brk, int nr) > return 0; > } > > -static void set_dawr_cb(void *info) > +static void disable_dawrs(void *info)
Can you explain a bit more what you do exactly ? Why do you change the name of the function and why the parameter becomes NULL ? And why it doens't take into account the parameter anymore ?
> { > - set_dawr(info, 0); > + struct arch_hw_breakpoint null_brk = {0}; > + int i; > + > + for (i = 0; i < nr_wp_slots(); i++) > + set_dawr(&null_brk, i); > } > > static ssize_t dawr_write_file_bool(struct file *file, > @@ -74,7 +78,7 @@ static ssize_t dawr_write_file_bool(struct file *file, > > /* If we are clearing, make sure all CPUs have the DAWR cleared */ > if (!dawr_force_enable) > - smp_call_function(set_dawr_cb, &null_brk, 0); > + smp_call_function(disable_dawrs, NULL, 0); > > return rc; > } >
Christophe
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