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powerpc: ptrace: user_regset_copyin_ignore() always returns 0 

user_regset_copyin_ignore() always returns 0, so checking its result seems
pointless -- don't do this anymore...

[akpm@linux-foundation.org: fix gpr32_set_common()]
Link: https://lkml.kernel.org/r/20221014212235.10770-11-s.shtylyov@omp.ru
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Cc: Brian Cain <bcain@quicinc.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: David S. Miller <davem@davemloft.net>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Helge Deller <deller@gmx.de>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.osdn.me>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Sergey Shtylyov 2022-10-15 00:22:32 +03:00 committed by Andrew Morton
parent fa3ff3bfa8
commit 18b9fe54d9
2 changed files with 13 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/powerpc/kernel/ptrace/ptrace-tm.c
View File

@ -170,9 +170,9 @@ int tm_cgpr_set(struct task_struct *target, const struct user_regset *regset,
(PT_MAX_PUT_REG + 1) * sizeof(reg));
if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
(PT_MAX_PUT_REG + 1) * sizeof(reg),
PT_TRAP * sizeof(reg));
user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
(PT_MAX_PUT_REG + 1) * sizeof(reg),
PT_TRAP * sizeof(reg));
if (!ret && count > 0) {
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &reg,
@ -183,8 +183,8 @@ int tm_cgpr_set(struct task_struct *target, const struct user_regset *regset,
}
if (!ret)
ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
(PT_TRAP + 1) * sizeof(reg), -1);
user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
(PT_TRAP + 1) * sizeof(reg), -1);
return ret;
}

15
arch/powerpc/kernel/ptrace/ptrace-view.c
View File

@ -267,9 +267,9 @@ static int gpr_set(struct task_struct *target, const struct user_regset *regset,
(PT_MAX_PUT_REG + 1) * sizeof(reg));
if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
(PT_MAX_PUT_REG + 1) * sizeof(reg),
PT_TRAP * sizeof(reg));
user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
(PT_MAX_PUT_REG + 1) * sizeof(reg),
PT_TRAP * sizeof(reg));
if (!ret && count > 0) {
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &reg,
@ -280,8 +280,8 @@ static int gpr_set(struct task_struct *target, const struct user_regset *regset,
}
if (!ret)
ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
(PT_TRAP + 1) * sizeof(reg), -1);
user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
(PT_TRAP + 1) * sizeof(reg), -1);
return ret;
}
@ -706,8 +706,9 @@ int gpr32_set_common(struct task_struct *target,
ubuf = u;
pos *= sizeof(reg);
count *= sizeof(reg);
return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
(PT_TRAP + 1) * sizeof(reg), -1);
user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
(PT_TRAP + 1) * sizeof(reg), -1);
return 0;
Efault:
user_read_access_end();