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Peter Anvin" , Chris Zankel , Max Filippov Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-csky@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, cgroups@vger.kernel.org, linux-security-module@vger.kernel.org, linux-trace-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-perf-users@vger.kernel.org, apparmor@lists.ubuntu.com, selinux@vger.kernel.org, linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, Simon Schuster X-Mailer: b4 0.14.3-dev-2ce6c X-Developer-Signature: v=1; a=ed25519-sha256; t=1756732247; l=2260; i=schuster.simon@siemens-energy.com; s=20250818; h=from:subject:message-id; bh=af84J4YQt0c2u1+xik140Isbk9cuIhCMOLjW6thJwsY=; b=d7NLA1iQDxLQGisMH0KtrKIUv8tslRZQ31+BK5A9IfF7XRRqtN0/NtBHPN1763CSVsp/AaVUs Xc5SawZJT/gDUL4ePU56689mSaXuGDc8R0/3KXZ7O8sV4jJB/D/Z4M0 X-Developer-Key: i=schuster.simon@siemens-energy.com; a=ed25519; pk=PUhOMiSp43aSeRE1H41KApxYOluamBFFiMfKlBjocvo= X-Endpoint-Received: by B4 Relay for schuster.simon@siemens-energy.com/20250818 with auth_id=495 X-Original-From: Simon Schuster Reply-To: schuster.simon@siemens-energy.com X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 7E13480014 X-Stat-Signature: gwunqnpphih8momkaeceokkaqu5fcn89 X-Rspam-User: X-HE-Tag: 1756732254-616368 X-HE-Meta: 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 detQpq2G 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Simon Schuster This commit adds the sys_clone3 entry point for nios2. An architecture-specific wrapper (__sys_clone3) is required to save and restore additional registers to the kernel stack via SAVE_SWITCH_STACK and RESTORE_SWITCH_STACK. Signed-off-by: Simon Schuster --- arch/nios2/include/asm/syscalls.h | 1 + arch/nios2/include/asm/unistd.h | 2 -- arch/nios2/kernel/entry.S | 6 ++++++ arch/nios2/kernel/syscall_table.c | 1 + 4 files changed, 8 insertions(+), 2 deletions(-) diff --git a/arch/nios2/include/asm/syscalls.h b/arch/nios2/include/asm/syscalls.h index b4d4ed3bf9c8..0e214b0a0ac8 100644 --- a/arch/nios2/include/asm/syscalls.h +++ b/arch/nios2/include/asm/syscalls.h @@ -7,6 +7,7 @@ int sys_cacheflush(unsigned long addr, unsigned long len, unsigned int op); +asmlinkage long __sys_clone3(struct clone_args __user *uargs, size_t size); #include diff --git a/arch/nios2/include/asm/unistd.h b/arch/nios2/include/asm/unistd.h index 1146e56473c5..213f6de3cf7b 100644 --- a/arch/nios2/include/asm/unistd.h +++ b/arch/nios2/include/asm/unistd.h @@ -7,6 +7,4 @@ #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SET_GET_RLIMIT -#define __ARCH_BROKEN_SYS_CLONE3 - #endif diff --git a/arch/nios2/kernel/entry.S b/arch/nios2/kernel/entry.S index 99f0a65e6234..dd40dfd908e5 100644 --- a/arch/nios2/kernel/entry.S +++ b/arch/nios2/kernel/entry.S @@ -403,6 +403,12 @@ ENTRY(sys_clone) addi sp, sp, 4 RESTORE_SWITCH_STACK ret +/* long syscall(SYS_clone3, struct clone_args *cl_args, size_t size); */ +ENTRY(__sys_clone3) + SAVE_SWITCH_STACK + call sys_clone3 + RESTORE_SWITCH_STACK + ret ENTRY(sys_rt_sigreturn) SAVE_SWITCH_STACK diff --git a/arch/nios2/kernel/syscall_table.c b/arch/nios2/kernel/syscall_table.c index 434694067d8f..c99818aac9e1 100644 --- a/arch/nios2/kernel/syscall_table.c +++ b/arch/nios2/kernel/syscall_table.c @@ -13,6 +13,7 @@ #define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native) #define sys_mmap2 sys_mmap_pgoff +#define sys_clone3 __sys_clone3 void *sys_call_table[__NR_syscalls] = { [0 ... __NR_syscalls-1] = sys_ni_syscall, -- 2.39.5