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sparc_brk() is not needed anymore

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the checks it's doing are duplicated in sys_brk() and failing
them early makes no sense, AFAICT.

Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2009-12-03 19:51:02 -05:00
parent 2c6a10161d
commit 05d72faa6d
5 changed files with 3 additions and 25 deletions
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9
arch/sparc/kernel/sys_sparc_32.c
View File

@ -79,15 +79,6 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsi
} }
} }
asmlinkage unsigned long sparc_brk(unsigned long brk)
{
if(ARCH_SUN4C) {
if ((brk & 0xe0000000) != (current->mm->brk & 0xe0000000))
return current->mm->brk;
}
return sys_brk(brk);
}
/* /*
* sys_pipe() is the normal C calling standard for creating * sys_pipe() is the normal C calling standard for creating
* a pipe. It's not the way unix traditionally does this, though. * a pipe. It's not the way unix traditionally does this, though.

12
arch/sparc/kernel/sys_sparc_64.c
View File

@ -403,18 +403,6 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
} }
} }
SYSCALL_DEFINE1(sparc_brk, unsigned long, brk)
{
/* People could try to be nasty and use ta 0x6d in 32bit programs */
if (test_thread_flag(TIF_32BIT) && brk >= STACK_TOP32)
return current->mm->brk;
if (unlikely(straddles_64bit_va_hole(current->mm->brk, brk)))
return current->mm->brk;
return sys_brk(brk);
}
/* /*
* sys_pipe() is the normal C calling standard for creating * sys_pipe() is the normal C calling standard for creating
* a pipe. It's not the way unix traditionally does this, though. * a pipe. It's not the way unix traditionally does this, though.

1
arch/sparc/kernel/systbls.h
View File

@ -9,7 +9,6 @@
struct new_utsname; struct new_utsname;
extern asmlinkage unsigned long sys_getpagesize(void); extern asmlinkage unsigned long sys_getpagesize(void);
extern asmlinkage unsigned long sparc_brk(unsigned long brk);
extern asmlinkage long sparc_pipe(struct pt_regs *regs); extern asmlinkage long sparc_pipe(struct pt_regs *regs);
extern asmlinkage long sys_ipc(unsigned int call, int first, extern asmlinkage long sys_ipc(unsigned int call, int first,
unsigned long second, unsigned long second,

2
arch/sparc/kernel/systbls_32.S
View File

@ -19,7 +19,7 @@ sys_call_table:
/*0*/ .long sys_restart_syscall, sys_exit, sys_fork, sys_read, sys_write /*0*/ .long sys_restart_syscall, sys_exit, sys_fork, sys_read, sys_write
/*5*/ .long sys_open, sys_close, sys_wait4, sys_creat, sys_link /*5*/ .long sys_open, sys_close, sys_wait4, sys_creat, sys_link
/*10*/ .long sys_unlink, sunos_execv, sys_chdir, sys_chown16, sys_mknod /*10*/ .long sys_unlink, sunos_execv, sys_chdir, sys_chown16, sys_mknod
/*15*/ .long sys_chmod, sys_lchown16, sparc_brk, sys_nis_syscall, sys_lseek /*15*/ .long sys_chmod, sys_lchown16, sys_brk, sys_nis_syscall, sys_lseek
/*20*/ .long sys_getpid, sys_capget, sys_capset, sys_setuid16, sys_getuid16 /*20*/ .long sys_getpid, sys_capget, sys_capset, sys_setuid16, sys_getuid16
/*25*/ .long sys_vmsplice, sys_ptrace, sys_alarm, sys_sigaltstack, sys_pause /*25*/ .long sys_vmsplice, sys_ptrace, sys_alarm, sys_sigaltstack, sys_pause
/*30*/ .long sys_utime, sys_lchown, sys_fchown, sys_access, sys_nice /*30*/ .long sys_utime, sys_lchown, sys_fchown, sys_access, sys_nice

4
arch/sparc/kernel/systbls_64.S
View File

@ -21,7 +21,7 @@ sys_call_table32:
/*0*/ .word sys_restart_syscall, sys32_exit, sys_fork, sys_read, sys_write /*0*/ .word sys_restart_syscall, sys32_exit, sys_fork, sys_read, sys_write
/*5*/ .word sys32_open, sys_close, sys32_wait4, sys32_creat, sys_link /*5*/ .word sys32_open, sys_close, sys32_wait4, sys32_creat, sys_link
/*10*/ .word sys_unlink, sunos_execv, sys_chdir, sys_chown16, sys32_mknod /*10*/ .word sys_unlink, sunos_execv, sys_chdir, sys_chown16, sys32_mknod
/*15*/ .word sys_chmod, sys_lchown16, sys_sparc_brk, sys32_perfctr, sys32_lseek /*15*/ .word sys_chmod, sys_lchown16, sys_brk, sys32_perfctr, sys32_lseek
/*20*/ .word sys_getpid, sys_capget, sys_capset, sys_setuid16, sys_getuid16 /*20*/ .word sys_getpid, sys_capget, sys_capset, sys_setuid16, sys_getuid16
/*25*/ .word sys32_vmsplice, compat_sys_ptrace, sys_alarm, sys32_sigaltstack, sys_pause /*25*/ .word sys32_vmsplice, compat_sys_ptrace, sys_alarm, sys32_sigaltstack, sys_pause
/*30*/ .word compat_sys_utime, sys_lchown, sys_fchown, sys32_access, sys32_nice /*30*/ .word compat_sys_utime, sys_lchown, sys_fchown, sys32_access, sys32_nice
@ -96,7 +96,7 @@ sys_call_table:
/*0*/ .word sys_restart_syscall, sparc_exit, sys_fork, sys_read, sys_write /*0*/ .word sys_restart_syscall, sparc_exit, sys_fork, sys_read, sys_write
/*5*/ .word sys_open, sys_close, sys_wait4, sys_creat, sys_link /*5*/ .word sys_open, sys_close, sys_wait4, sys_creat, sys_link
/*10*/ .word sys_unlink, sys_nis_syscall, sys_chdir, sys_chown, sys_mknod /*10*/ .word sys_unlink, sys_nis_syscall, sys_chdir, sys_chown, sys_mknod
/*15*/ .word sys_chmod, sys_lchown, sys_sparc_brk, sys_perfctr, sys_lseek /*15*/ .word sys_chmod, sys_lchown, sys_brk, sys_perfctr, sys_lseek
/*20*/ .word sys_getpid, sys_capget, sys_capset, sys_setuid, sys_getuid /*20*/ .word sys_getpid, sys_capget, sys_capset, sys_setuid, sys_getuid
/*25*/ .word sys_vmsplice, sys_ptrace, sys_alarm, sys_sigaltstack, sys_nis_syscall /*25*/ .word sys_vmsplice, sys_ptrace, sys_alarm, sys_sigaltstack, sys_nis_syscall
/*30*/ .word sys_utime, sys_nis_syscall, sys_nis_syscall, sys_access, sys_nice /*30*/ .word sys_utime, sys_nis_syscall, sys_nis_syscall, sys_access, sys_nice