redonkable/alistair23-linux
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kill useless checks in sparc mremap variants

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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 2009-11-24 08:53:51 -05:00
parent 935874141d
commit 0ec62d2909
5 changed files with 2 additions and 51 deletions
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22
arch/sparc/kernel/sys_sparc32.c
View file

@ -564,28 +564,6 @@ asmlinkage long sparc32_open(const char __user *filename,
return do_sys_open(AT_FDCWD, filename, flags, mode);
}
extern unsigned long do_mremap(unsigned long addr,
unsigned long old_len, unsigned long new_len,
unsigned long flags, unsigned long new_addr);
asmlinkage unsigned long sys32_mremap(unsigned long addr,
unsigned long old_len, unsigned long new_len,
unsigned long flags, u32 __new_addr)
{
unsigned long ret = -EINVAL;
unsigned long new_addr = __new_addr;
if (unlikely(sparc_mmap_check(addr, old_len)))
goto out;
if (unlikely(sparc_mmap_check(new_addr, new_len)))
goto out;
down_write(&current->mm->mmap_sem);
ret = do_mremap(addr, old_len, new_len, flags, new_addr);
up_write(&current->mm->mmap_sem);
out:
return ret;
}
long sys32_lookup_dcookie(unsigned long cookie_high,
unsigned long cookie_low,
char __user *buf, size_t len)

21
arch/sparc/kernel/sys_sparc_32.c
View file

@ -287,27 +287,6 @@ long sparc_remap_file_pages(unsigned long start, unsigned long size,
(pgoff >> (PAGE_SHIFT - 12)), flags);
}
extern unsigned long do_mremap(unsigned long addr,
unsigned long old_len, unsigned long new_len,
unsigned long flags, unsigned long new_addr);
asmlinkage unsigned long sparc_mremap(unsigned long addr,
unsigned long old_len, unsigned long new_len,
unsigned long flags, unsigned long new_addr)
{
unsigned long ret = -EINVAL;
if (unlikely(sparc_mmap_check(addr, old_len)))
goto out;
if (unlikely(sparc_mmap_check(new_addr, new_len)))
goto out;
down_write(&current->mm->mmap_sem);
ret = do_mremap(addr, old_len, new_len, flags, new_addr);
up_write(&current->mm->mmap_sem);
out:
return ret;
}
/* we come to here via sys_nis_syscall so it can setup the regs argument */
asmlinkage unsigned long
c_sys_nis_syscall (struct pt_regs *regs)

6
arch/sparc/kernel/sys_sparc_64.c
View file

@ -614,12 +614,6 @@ SYSCALL_DEFINE5(64_mremap, unsigned long, addr, unsigned long, old_len,
if (test_thread_flag(TIF_32BIT))
goto out;
if (unlikely(new_len >= VA_EXCLUDE_START))
goto out;
if (unlikely(sparc_mmap_check(addr, old_len)))
goto out;
if (unlikely(sparc_mmap_check(new_addr, new_len)))
goto out;
down_write(&current->mm->mmap_sem);
ret = do_mremap(addr, old_len, new_len, flags, new_addr);

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

@ -67,7 +67,7 @@ sys_call_table:
/*235*/ .long sys_fstatfs64, sys_llseek, sys_mlock, sys_munlock, sys_mlockall
/*240*/ .long sys_munlockall, sys_sched_setparam, sys_sched_getparam, sys_sched_setscheduler, sys_sched_getscheduler
/*245*/ .long sys_sched_yield, sys_sched_get_priority_max, sys_sched_get_priority_min, sys_sched_rr_get_interval, sys_nanosleep
/*250*/ .long sparc_mremap, sys_sysctl, sys_getsid, sys_fdatasync, sys_nfsservctl
/*250*/ .long sys_mremap, sys_sysctl, sys_getsid, sys_fdatasync, sys_nfsservctl
/*255*/ .long sys_sync_file_range, sys_clock_settime, sys_clock_gettime, sys_clock_getres, sys_clock_nanosleep
/*260*/ .long sys_sched_getaffinity, sys_sched_setaffinity, sys_timer_settime, sys_timer_gettime, sys_timer_getoverrun
/*265*/ .long sys_timer_delete, sys_timer_create, sys_nis_syscall, sys_io_setup, sys_io_destroy

2
arch/sparc/kernel/systbls_64.S
View file

@ -68,7 +68,7 @@ sys_call_table32:
.word compat_sys_fstatfs64, sys_llseek, sys_mlock, sys_munlock, sys32_mlockall
/*240*/ .word sys_munlockall, sys32_sched_setparam, sys32_sched_getparam, sys32_sched_setscheduler, sys32_sched_getscheduler
.word sys_sched_yield, sys32_sched_get_priority_max, sys32_sched_get_priority_min, sys32_sched_rr_get_interval, compat_sys_nanosleep
/*250*/ .word sys32_mremap, compat_sys_sysctl, sys32_getsid, sys_fdatasync, sys32_nfsservctl
/*250*/ .word sys_mremap, compat_sys_sysctl, sys32_getsid, sys_fdatasync, sys32_nfsservctl
.word sys32_sync_file_range, compat_sys_clock_settime, compat_sys_clock_gettime, compat_sys_clock_getres, sys32_clock_nanosleep
/*260*/ .word compat_sys_sched_getaffinity, compat_sys_sched_setaffinity, sys32_timer_settime, compat_sys_timer_gettime, sys_timer_getoverrun
.word sys_timer_delete, compat_sys_timer_create, sys_ni_syscall, compat_sys_io_setup, sys_io_destroy