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MIPS: Branch straight to ll in mips_atomic_set()

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Adjust the atomic loop in the MIPS_ATOMIC_SET operation of the sysmips
system call to branch straight back to the linked load rather than
jumping via a different subsection (whose purpose remains a mystery to
me).

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16150/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
James Hogan 2017-05-31 16:19:50 +01:00 committed by Ralf Baechle
parent 4915e1b043
commit 203e090ade
1 changed files with 1 additions and 5 deletions
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6
arch/mips/kernel/syscall.c
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@ -137,13 +137,9 @@ static inline int mips_atomic_set(unsigned long addr, unsigned long new)
" move %[tmp], %[new] \n"
"2: \n"
user_sc("%[tmp]", "(%[addr])")
" beqz %[tmp], 4f \n"
" beqz %[tmp], 1b \n"
"3: \n"
" .insn \n"
" .subsection 2 \n"
"4: b 1b \n"
" .previous \n"
" \n"
" .section .fixup,\"ax\" \n"
"5: li %[err], %[efault] \n"
" j 3b \n"