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| author | Nicholas Piggin <npiggin@gmail.com> | 2021-01-30 23:08:16 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-02-09 00:02:08 +1100 |
| commit | a01a3f2ddbcda83e8572787c0ec1dcbeba86915a (patch) | |
| tree | 497891fcc997665e9e4d57cc6cf8fdf19c5bf72a /arch/powerpc/kernel/head_40x.S | |
| parent | a4922f5442e7e6ce85da304e224d940edec2f1fb (diff) | |
| download | linux-a01a3f2ddbcda83e8572787c0ec1dcbeba86915a.tar.gz | |
powerpc: remove arguments from fault handler functions
Make mm fault handlers all just take the pt_regs * argument and load
DAR/DSISR from that. Make those that return a value return long.
This is done to make the function signatures match other handlers, which
will help with a future patch to add wrappers. Explicit arguments could
be added for performance but that would require more wrapper macro
variants.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210130130852.2952424-7-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kernel/head_40x.S')
| -rw-r--r-- | arch/powerpc/kernel/head_40x.S | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S index a1ae00689e0f..3c5577ac4dc8 100644 --- a/arch/powerpc/kernel/head_40x.S +++ b/arch/powerpc/kernel/head_40x.S @@ -179,9 +179,9 @@ _ENTRY(saved_ksp_limit) */ START_EXCEPTION(0x0300, DataStorage) EXCEPTION_PROLOG - mfspr r5, SPRN_ESR /* Grab the ESR, save it, pass arg3 */ + mfspr r5, SPRN_ESR /* Grab the ESR, save it */ stw r5, _ESR(r11) - mfspr r4, SPRN_DEAR /* Grab the DEAR, save it, pass arg2 */ + mfspr r4, SPRN_DEAR /* Grab the DEAR, save it */ stw r4, _DEAR(r11) EXC_XFER_LITE(0x300, handle_page_fault) @@ -191,9 +191,9 @@ _ENTRY(saved_ksp_limit) */ START_EXCEPTION(0x0400, InstructionAccess) EXCEPTION_PROLOG - mr r4,r12 /* Pass SRR0 as arg2 */ - stw r4, _DEAR(r11) - li r5,0 /* Pass zero as arg3 */ + li r5,0 + stw r5, _ESR(r11) /* Zero ESR */ + stw r12, _DEAR(r11) /* SRR0 as DEAR */ EXC_XFER_LITE(0x400, handle_page_fault) /* 0x0500 - External Interrupt Exception */ |