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: 9e27086292aa ("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

diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index 9bb663977e84e586bcbec5c48f96c43233a9043d..2cec543c38f01d9c4f7cb2db577828dea548a388 100644 (file)
--- a/arch/powerpc/kernel/head_40x.S
+++ b/arch/powerpc/kernel/head_40x.S
@@ -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)