+1

arch/alpha/kernel/syscalls/syscall.tbl

reviewed

··· 510 510 578 common file_getattr sys_file_getattr 511 511 579 common file_setattr sys_file_setattr 512 512 580 common listns sys_listns 513 513 + 581 common rseq_slice_yield sys_rseq_slice_yield

+1

arch/arm/tools/syscall.tbl

reviewed

··· 485 485 468 common file_getattr sys_file_getattr 486 486 469 common file_setattr sys_file_setattr 487 487 470 common listns sys_listns 488 488 + 471 common rseq_slice_yield sys_rseq_slice_yield

+1

arch/arm64/tools/syscall_32.tbl

reviewed

··· 482 482 468 common file_getattr sys_file_getattr 483 483 469 common file_setattr sys_file_setattr 484 484 470 common listns sys_listns 485 485 + 471 common rseq_slice_yield sys_rseq_slice_yield

+1

arch/m68k/kernel/syscalls/syscall.tbl

reviewed

··· 470 470 468 common file_getattr sys_file_getattr 471 471 469 common file_setattr sys_file_setattr 472 472 470 common listns sys_listns 473 473 + 471 common rseq_slice_yield sys_rseq_slice_yield

+1

arch/microblaze/kernel/syscalls/syscall.tbl

reviewed

··· 476 476 468 common file_getattr sys_file_getattr 477 477 469 common file_setattr sys_file_setattr 478 478 470 common listns sys_listns 479 479 + 471 common rseq_slice_yield sys_rseq_slice_yield

+1

arch/mips/kernel/syscalls/syscall_n32.tbl

reviewed

··· 409 409 468 n32 file_getattr sys_file_getattr 410 410 469 n32 file_setattr sys_file_setattr 411 411 470 n32 listns sys_listns 412 412 + 471 n32 rseq_slice_yield sys_rseq_slice_yield

+1

arch/mips/kernel/syscalls/syscall_n64.tbl

reviewed

··· 385 385 468 n64 file_getattr sys_file_getattr 386 386 469 n64 file_setattr sys_file_setattr 387 387 470 n64 listns sys_listns 388 388 + 471 n64 rseq_slice_yield sys_rseq_slice_yield

+1

arch/mips/kernel/syscalls/syscall_o32.tbl

reviewed

··· 458 458 468 o32 file_getattr sys_file_getattr 459 459 469 o32 file_setattr sys_file_setattr 460 460 470 o32 listns sys_listns 461 461 + 471 o32 rseq_slice_yield sys_rseq_slice_yield

+1

arch/parisc/kernel/syscalls/syscall.tbl

reviewed

··· 469 469 468 common file_getattr sys_file_getattr 470 470 469 common file_setattr sys_file_setattr 471 471 470 common listns sys_listns 472 472 + 471 common rseq_slice_yield sys_rseq_slice_yield

+1

arch/powerpc/kernel/syscalls/syscall.tbl

reviewed

··· 561 561 468 common file_getattr sys_file_getattr 562 562 469 common file_setattr sys_file_setattr 563 563 470 common listns sys_listns 564 564 + 471 nospu rseq_slice_yield sys_rseq_slice_yield

+1

arch/s390/kernel/syscalls/syscall.tbl

reviewed

··· 397 397 468 common file_getattr sys_file_getattr 398 398 469 common file_setattr sys_file_setattr 399 399 470 common listns sys_listns 400 400 + 471 common rseq_slice_yield sys_rseq_slice_yield

+1

arch/sh/kernel/syscalls/syscall.tbl

reviewed

··· 474 474 468 common file_getattr sys_file_getattr 475 475 469 common file_setattr sys_file_setattr 476 476 470 common listns sys_listns 477 477 + 471 common rseq_slice_yield sys_rseq_slice_yield

+1

arch/sparc/kernel/syscalls/syscall.tbl

reviewed

··· 516 516 468 common file_getattr sys_file_getattr 517 517 469 common file_setattr sys_file_setattr 518 518 470 common listns sys_listns 519 519 + 471 common rseq_slice_yield sys_rseq_slice_yield

+1

arch/x86/entry/syscalls/syscall_32.tbl

reviewed

··· 476 476 468 i386 file_getattr sys_file_getattr 477 477 469 i386 file_setattr sys_file_setattr 478 478 470 i386 listns sys_listns 479 479 + 471 i386 rseq_slice_yield sys_rseq_slice_yield

+1

arch/x86/entry/syscalls/syscall_64.tbl

reviewed

··· 395 395 468 common file_getattr sys_file_getattr 396 396 469 common file_setattr sys_file_setattr 397 397 470 common listns sys_listns 398 398 + 471 common rseq_slice_yield sys_rseq_slice_yield 398 399 399 400 # 400 401 # Due to a historical design error, certain syscalls are numbered differently

+1

arch/xtensa/kernel/syscalls/syscall.tbl

reviewed

··· 441 441 468 common file_getattr sys_file_getattr 442 442 469 common file_setattr sys_file_setattr 443 443 470 common listns sys_listns 444 444 + 471 common rseq_slice_yield sys_rseq_slice_yield

+2

include/linux/rseq_types.h

reviewed

··· 89 89 /** 90 90 * struct rseq_slice - Status information for rseq time slice extension 91 91 * @state: Time slice extension state 92 92 + * @yielded: Indicator for rseq_slice_yield() 92 93 */ 93 94 struct rseq_slice { 94 95 union rseq_slice_state state; 96 96 + u8 yielded; 95 97 }; 96 98 97 99 /**

+1

include/linux/syscalls.h

reviewed

··· 961 961 unsigned mask, struct statx __user *buffer); 962 962 asmlinkage long sys_rseq(struct rseq __user *rseq, uint32_t rseq_len, 963 963 int flags, uint32_t sig); 964 964 + asmlinkage long sys_rseq_slice_yield(void); 964 965 asmlinkage long sys_open_tree(int dfd, const char __user *path, unsigned flags); 965 966 asmlinkage long sys_open_tree_attr(int dfd, const char __user *path, 966 967 unsigned flags,

+4 -1

include/uapi/asm-generic/unistd.h

reviewed

··· 860 860 #define __NR_listns 470 861 861 __SYSCALL(__NR_listns, sys_listns) 862 862 863 863 + #define __NR_rseq_slice_yield 471 864 864 + __SYSCALL(__NR_rseq_slice_yield, sys_rseq_slice_yield) 865 865 + 863 866 #undef __NR_syscalls 864 864 - #define __NR_syscalls 471 867 867 + #define __NR_syscalls 472 865 868 866 869 /* 867 870 * 32 bit systems traditionally used different

+21

kernel/rseq.c

reviewed

··· 553 553 return -EFAULT; 554 554 } 555 555 556 556 + /** 557 557 + * sys_rseq_slice_yield - yield the current processor side effect free if a 558 558 + * task granted with a time slice extension is done with 559 559 + * the critical work before being forced out. 560 560 + * 561 561 + * Return: 1 if the task successfully yielded the CPU within the granted slice. 562 562 + * 0 if the slice extension was either never granted or was revoked by 563 563 + * going over the granted extension, using a syscall other than this one 564 564 + * or being scheduled out earlier due to a subsequent interrupt. 565 565 + * 566 566 + * The syscall does not schedule because the syscall entry work immediately 567 567 + * relinquishes the CPU and schedules if required. 568 568 + */ 569 569 + SYSCALL_DEFINE0(rseq_slice_yield) 570 570 + { 571 571 + int yielded = !!current->rseq.slice.yielded; 572 572 + 573 573 + current->rseq.slice.yielded = 0; 574 574 + return yielded; 575 575 + } 576 576 + 556 577 static int __init rseq_slice_cmdline(char *str) 557 578 { 558 579 bool on;

+1

kernel/sys_ni.c

reviewed

··· 390 390 391 391 /* restartable sequence */ 392 392 COND_SYSCALL(rseq); 393 393 + COND_SYSCALL(rseq_slice_yield); 393 394 394 395 COND_SYSCALL(uretprobe); 395 396 COND_SYSCALL(uprobe);

+1

scripts/syscall.tbl

reviewed

··· 411 411 468 common file_getattr sys_file_getattr 412 412 469 common file_setattr sys_file_setattr 413 413 470 common listns sys_listns 414 414 + 471 common rseq_slice_yield sys_rseq_slice_yield