From 9f0346dcbea363787186c94ef94dd01aaa215afa Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 5 Sep 2026 11:59:05 -0700 Subject: Merge tag 'driver-core-7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core Pull driver core fixes from Danilo Krummrich: - Fix kernfs listxattr() not returning security xattr names (e.g. SELinux labels) when the kernfs node has no allocated kernfs_iattrs - Fix silent truncation of IRQ vector indices in the Rust PCI abstractions - Don't select OF from DRIVER_PE_KUNIT_TEST; skip the test when OF is disabled instead of silently enabling extra kernel functionality - Russ Weight is retiring from kernel development; update the Firmware Loader sysfs contact to the driver-core mailing list, add a CREDITS entry for Firmware Upload, and update MAINTAINERS accordingly * tag 'driver-core-7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: MAINTAINERS: Remove Russ Weight from Firmware Loader CREDITS: Add CREDITS entry for Firmware Upload firmware_loader: Change contact for sysfs nodes rust: pci: reject IRQ vector indices that do not fit in u32 kernfs: preserve security xattrs without allocating iattrs drivers: base: test: DRIVER_PE_KUNIT_TEST should not select OF --- arch/xtensa/lib/modsi3.S | 88 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 arch/xtensa/lib/modsi3.S (limited to 'arch/xtensa/lib/modsi3.S') diff --git a/arch/xtensa/lib/modsi3.S b/arch/xtensa/lib/modsi3.S new file mode 100644 index 000000000..c5f4295c6 --- /dev/null +++ b/arch/xtensa/lib/modsi3.S @@ -0,0 +1,88 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */ +#include +#include +#include + +ENTRY(__modsi3) + + abi_entry_default +#if XCHAL_HAVE_DIV32 + rems a2, a2, a3 +#else + mov a7, a2 /* save original (signed) dividend */ + do_abs a2, a2, a4 /* udividend = abs (dividend) */ + do_abs a3, a3, a4 /* udivisor = abs (divisor) */ + bltui a3, 2, .Lle_one /* check if udivisor <= 1 */ + do_nsau a5, a2, a6, a8 /* udividend_shift = nsau (udividend) */ + do_nsau a4, a3, a6, a8 /* udivisor_shift = nsau (udivisor) */ + bgeu a5, a4, .Lspecial + + sub a4, a4, a5 /* count = udivisor_shift - udividend_shift */ + ssl a4 + sll a3, a3 /* udivisor <<= count */ + + /* test-subtract-and-shift loop */ +#if XCHAL_HAVE_LOOPS + loopnez a4, .Lloopend +#endif /* XCHAL_HAVE_LOOPS */ +.Lloop: + bltu a2, a3, .Lzerobit + sub a2, a2, a3 +.Lzerobit: + srli a3, a3, 1 +#if !XCHAL_HAVE_LOOPS + addi a4, a4, -1 + bnez a4, .Lloop +#endif /* !XCHAL_HAVE_LOOPS */ +.Lloopend: + +.Lspecial: + bltu a2, a3, .Lreturn + sub a2, a2, a3 /* subtract again if udividend >= udivisor */ +.Lreturn: + bgez a7, .Lpositive + neg a2, a2 /* if (dividend < 0), return -udividend */ +.Lpositive: + abi_ret_default + +.Lle_one: + bnez a3, .Lreturn0 + + /* Divide by zero: Use an illegal instruction to force an exception. + The subsequent "DIV0" string can be recognized by the exception + handler to identify the real cause of the exception. */ + ill + .ascii "DIV0" + +.Lreturn0: + movi a2, 0 +#endif /* XCHAL_HAVE_DIV32 */ + abi_ret_default + +ENDPROC(__modsi3) +EXPORT_SYMBOL(__modsi3) + +#if !XCHAL_HAVE_NSA + .section .rodata + .align 4 + .global __nsau_data + .type __nsau_data, @object +__nsau_data: + .byte 8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4 + .byte 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 + .byte 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 + .byte 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 + .byte 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 + .byte 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 + .byte 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 + .byte 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 + .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + .size __nsau_data, . - __nsau_data +#endif /* !XCHAL_HAVE_NSA */ -- cgit v1.3.1