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| author | Karl Beldan <karl.beldan@gmail.com> | 2017-06-27 19:22:16 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2017-06-27 23:35:21 +0200 |
| commit | 25d8b92e0af75d72ce8b99e63e5a449cc0888efa (patch) | |
| tree | 72fa5534d97c8d3b7d03570278a7529cfc370aab /arch | |
| parent | c0bc126f97fb929b3ae02c1c62322645d70eb408 (diff) | |
| download | linux-25d8b92e0af75d72ce8b99e63e5a449cc0888efa.tar.gz | |
MIPS: head: Reorder instructions missing a delay slot
In this sequence the 'move' is assumed in the delay slot of the 'beq',
but head.S is in reorder mode and the former gets pushed one 'nop'
farther by the assembler.
The corrected behavior made booting with an UHI supplied dtb erratic.
Fixes: 15f37e158892 ("MIPS: store the appended dtb address in a variable")
Signed-off-by: Karl Beldan <karl.beldan+oss@gmail.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: Jonas Gorski <jogo@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/16614/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/kernel/head.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S index cf052204eb0a..d1bb506adc10 100644 --- a/arch/mips/kernel/head.S +++ b/arch/mips/kernel/head.S @@ -106,8 +106,8 @@ NESTED(kernel_entry, 16, sp) # kernel entry point beq t0, t1, dtb_found #endif li t1, -2 - beq a0, t1, dtb_found move t2, a1 + beq a0, t1, dtb_found li t2, 0 dtb_found: |