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| author | Andi Shyti <andi.shyti@linux.intel.com> | 2026-08-22 14:19:12 +0200 |
|---|---|---|
| committer | Andi Shyti <andi.shyti@linux.intel.com> | 2026-08-22 14:19:34 +0200 |
| commit | d576a9561a1c80ae593539fb0ce0743d66825ac2 (patch) | |
| tree | 68f6de7e06b350afa42edeea2f7f33f086014597 /arch/sparc/lib/bitops.S | |
| download | linux-stable-d576a9561a1c80ae593539fb0ce0743d66825ac2.tar.gz linux-stable-d576a9561a1c80ae593539fb0ce0743d66825ac2.zip | |
Merge tag 'rust-i2c-for-7.3' into i2c/i2cgrafted
i2c: rust: mark I2cAdapter methods as inline
A single cleanup for the Rust I2C abstractions, targeting 7.3.
`I2cAdapter::get`, `inc_ref`, and `dec_ref` are trivial wrappers around
`i2c_get_adapter`/`i2c_put_adapter` and were showing up as their own
symbols in the build. Mark them `#[inline]` so they get folded into
their callers instead.
Signed-off-by: Igor Korotin <igor.korotin@linux.dev>
* tag 'rust-i2c-for-7.3':
i2c: rust: mark I2cAdapter methods as inline
Diffstat (limited to 'arch/sparc/lib/bitops.S')
| -rw-r--r-- | arch/sparc/lib/bitops.S | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/arch/sparc/lib/bitops.S b/arch/sparc/lib/bitops.S new file mode 100644 index 000000000..9c91cbb31 --- /dev/null +++ b/arch/sparc/lib/bitops.S @@ -0,0 +1,138 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* bitops.S: Sparc64 atomic bit operations. + * + * Copyright (C) 2000, 2007 David S. Miller (davem@davemloft.net) + */ + +#include <linux/export.h> +#include <linux/linkage.h> +#include <asm/asi.h> +#include <asm/backoff.h> + + .text + +ENTRY(test_and_set_bit) /* %o0=nr, %o1=addr */ + BACKOFF_SETUP(%o3) + srlx %o0, 6, %g1 + mov 1, %o2 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %o2, %g2, %o2 + add %o1, %g3, %o1 +1: ldx [%o1], %g7 + or %g7, %o2, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,pn %xcc, BACKOFF_LABEL(2f, 1b) + and %g7, %o2, %g2 + clr %o0 + movrne %g2, 1, %o0 + retl + nop +2: BACKOFF_SPIN(%o3, %o4, 1b) +ENDPROC(test_and_set_bit) +EXPORT_SYMBOL(test_and_set_bit) + +ENTRY(test_and_clear_bit) /* %o0=nr, %o1=addr */ + BACKOFF_SETUP(%o3) + srlx %o0, 6, %g1 + mov 1, %o2 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %o2, %g2, %o2 + add %o1, %g3, %o1 +1: ldx [%o1], %g7 + andn %g7, %o2, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,pn %xcc, BACKOFF_LABEL(2f, 1b) + and %g7, %o2, %g2 + clr %o0 + movrne %g2, 1, %o0 + retl + nop +2: BACKOFF_SPIN(%o3, %o4, 1b) +ENDPROC(test_and_clear_bit) +EXPORT_SYMBOL(test_and_clear_bit) + +ENTRY(test_and_change_bit) /* %o0=nr, %o1=addr */ + BACKOFF_SETUP(%o3) + srlx %o0, 6, %g1 + mov 1, %o2 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %o2, %g2, %o2 + add %o1, %g3, %o1 +1: ldx [%o1], %g7 + xor %g7, %o2, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,pn %xcc, BACKOFF_LABEL(2f, 1b) + and %g7, %o2, %g2 + clr %o0 + movrne %g2, 1, %o0 + retl + nop +2: BACKOFF_SPIN(%o3, %o4, 1b) +ENDPROC(test_and_change_bit) +EXPORT_SYMBOL(test_and_change_bit) + +ENTRY(set_bit) /* %o0=nr, %o1=addr */ + BACKOFF_SETUP(%o3) + srlx %o0, 6, %g1 + mov 1, %o2 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %o2, %g2, %o2 + add %o1, %g3, %o1 +1: ldx [%o1], %g7 + or %g7, %o2, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,pn %xcc, BACKOFF_LABEL(2f, 1b) + nop + retl + nop +2: BACKOFF_SPIN(%o3, %o4, 1b) +ENDPROC(set_bit) +EXPORT_SYMBOL(set_bit) + +ENTRY(clear_bit) /* %o0=nr, %o1=addr */ + BACKOFF_SETUP(%o3) + srlx %o0, 6, %g1 + mov 1, %o2 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %o2, %g2, %o2 + add %o1, %g3, %o1 +1: ldx [%o1], %g7 + andn %g7, %o2, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,pn %xcc, BACKOFF_LABEL(2f, 1b) + nop + retl + nop +2: BACKOFF_SPIN(%o3, %o4, 1b) +ENDPROC(clear_bit) +EXPORT_SYMBOL(clear_bit) + +ENTRY(change_bit) /* %o0=nr, %o1=addr */ + BACKOFF_SETUP(%o3) + srlx %o0, 6, %g1 + mov 1, %o2 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %o2, %g2, %o2 + add %o1, %g3, %o1 +1: ldx [%o1], %g7 + xor %g7, %o2, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,pn %xcc, BACKOFF_LABEL(2f, 1b) + nop + retl + nop +2: BACKOFF_SPIN(%o3, %o4, 1b) +ENDPROC(change_bit) +EXPORT_SYMBOL(change_bit) |