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powerpc/syscalls: Use sys_old_select() in ppc_select() 

Instead of opencodying the copy of parameters, use
the generic sys_old_select().

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/4de983ad254739da1fe6e9f273baf387b7043ae0.1615398498.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2021-03-10 17:57:03 +00:00 committed by Michael Ellerman
parent 4b8cda5881
commit fd69d544b0
2 changed files with 3 additions and 10 deletions
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1
arch/powerpc/include/asm/unistd.h
View File

@ -40,6 +40,7 @@
#define __ARCH_WANT_SYS_SIGPROCMASK #define __ARCH_WANT_SYS_SIGPROCMASK
#ifdef CONFIG_PPC32 #ifdef CONFIG_PPC32
#define __ARCH_WANT_OLD_STAT #define __ARCH_WANT_OLD_STAT
#define __ARCH_WANT_SYS_OLD_SELECT
#endif #endif
#ifdef CONFIG_PPC64 #ifdef CONFIG_PPC64
#define __ARCH_WANT_SYS_TIME #define __ARCH_WANT_SYS_TIME

12
arch/powerpc/kernel/syscalls.c
View File

@ -82,16 +82,8 @@ int
ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct __kernel_old_timeval __user *tvp) ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct __kernel_old_timeval __user *tvp)
{ {
if ( (unsigned long)n >= 4096 ) if ( (unsigned long)n >= 4096 )
{ return sys_old_select((void __user *)n);
unsigned long __user *buffer = (unsigned long __user *)n;
if (!access_ok(buffer, 5*sizeof(unsigned long))
|| __get_user(n, buffer)
|| __get_user(inp, ((fd_set __user * __user *)(buffer+1)))
|| __get_user(outp, ((fd_set __user * __user *)(buffer+2)))
|| __get_user(exp, ((fd_set __user * __user *)(buffer+3)))
|| __get_user(tvp, ((struct __kernel_old_timeval __user * __user *)(buffer+4))))
return -EFAULT;
}
return sys_select(n, inp, outp, exp, tvp); return sys_select(n, inp, outp, exp, tvp);
} }
#endif #endif