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To:     "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>
Cc:     linux-man <linux-man@vger.kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Guo Ren <guoren@kernel.org>, linux-csky@vger.kernel.org,
        Arnd Bergmann <arnd@arndb.de>
From:   "Alejandro Colomar (man-pages)" <alx.manpages@gmail.com>
Subject: set_thread_area.2: csky architecture undocumented
Message-ID: <014e670b-2a11-3deb-4e7e-bfe9defd8597@gmail.com>
Date:   Mon, 23 Nov 2020 22:31:05 +0100
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Hi Michael,

SYNOPSIS
       #include <linux/unistd.h>

       #if defined __i386__ || defined __x86_64__
       # include <asm/ldt.h>

       int get_thread_area(struct user_desc *u_info);
       int set_thread_area(struct user_desc *u_info);

       #elif defined __m68k__

       int get_thread_area(void);
       int set_thread_area(unsigned long tp);

       #elif defined __mips__

       int set_thread_area(unsigned long addr);

       #endif

       Note: There are no glibc wrappers for these system  calls;  see
       NOTES.


$ grep -rn 'SYSCALL_DEFINE.*et_thread_area'
arch/csky/kernel/syscall.c:6:
SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
arch/mips/kernel/syscall.c:86:
SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
arch/x86/kernel/tls.c:191:
SYSCALL_DEFINE1(set_thread_area, struct user_desc __user *, u_info)
arch/x86/kernel/tls.c:243:
SYSCALL_DEFINE1(get_thread_area, struct user_desc __user *, u_info)
arch/x86/um/tls_32.c:277:
SYSCALL_DEFINE1(set_thread_area, struct user_desc __user *, user_desc)
arch/x86/um/tls_32.c:325:
SYSCALL_DEFINE1(get_thread_area, struct user_desc __user *, user_desc)


See kernel commit 4859bfca11c7d63d55175bcd85a75d6cee4b7184


I'd change
-      #elif defined __mips__
+      #elif defined(__mips__ || __csky__)

and then change the rest of the text to add csky when appropriate.
Am I correct?

Thanks,

Alex