Commit 249c9b0c authored May 09, 2020 by Christophe Leroy Committed by Michael Ellerman May 12, 2020

powerpc/40x: Make more space for system call exception

When CONFIG_VIRT_CPU_ACCOUNTING is selected, system call exception
handler doesn't fit below 0xd00 and build fails.

As exception 0xd00 doesn't exist and is never generated by 40x,
comment it out in order to get more space for system call exception.

Fixes: 9e270862 ("powerpc/32: Warn and return ENOSYS on syscalls from kernel")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/633165d72f75b4ef4c0901aebe99d3915c93e9a2.1589043863.git.christophe.leroy@csgroup.eu

parent e963b7a2

arch/powerpc/kernel/head_40x.S

+2 −1

Original line number	Diff line number	Diff line
		@@ -344,8 +344,9 @@ _ENTRY(saved_ksp_limit)
		/* 0x0C00 - System Call Exception */
		START_EXCEPTION(0x0C00, SystemCall)
		SYSCALL_ENTRY 0xc00
		/* Trap_0D is commented out to get more space for system call exception */

		EXCEPTION(0x0D00, Trap_0D, unknown_exception, EXC_XFER_STD)
		/* EXCEPTION(0x0D00, Trap_0D, unknown_exception, EXC_XFER_STD) */
		EXCEPTION(0x0E00, Trap_0E, unknown_exception, EXC_XFER_STD)
		EXCEPTION(0x0F00, Trap_0F, unknown_exception, EXC_XFER_STD)