powerpc/watchpoint: Use loop for thread_struct->ptrace_bps

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ptrace_bps is already an array of size HBP_NUM_MAX. But we use
hardcoded index 0 while fetching/updating it. Convert such code
to loop over array.

ptrace interface to use multiple watchpoint remains same. eg:
two PPC_PTRACE_SETHWDEBUG calls will create two watchpoint if
underneath hw supports it.

Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Michael Neuling <mikey@neuling.org>
Link: https://lore.kernel.org/r/20200514111741.97993-11-ravi.bangoria@linux.ibm.com

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Ravi Bangoria 2020-05-14 16:47:35 +05:30 • committed by Michael Ellerman

parent 303e6a9ddc

commit 6b424efa11

3 changed files with 31 additions and 10 deletions

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7

arch/powerpc/kernel/hw_breakpoint.c

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6

arch/powerpc/kernel/process.c

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28

arch/powerpc/kernel/ptrace/ptrace-noadv.c

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