[tip: x86/fpu] x86/fpu/signal: Change return type of copy_fpregs_to_sigframe() helpers to boolean

From: tip-bot2 for Thomas Gleixner
Date: Tue Sep 14 2021 - 15:19:40 EST


The following commit has been merged into the x86/fpu branch of tip:

Commit-ID: 2af07f3a6e9fb81331421ca24b26a96180d792dd
Gitweb: https://git.kernel.org/tip/2af07f3a6e9fb81331421ca24b26a96180d792dd
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Wed, 08 Sep 2021 15:29:34 +02:00
Committer: Borislav Petkov <bp@xxxxxxx>
CommitterDate: Tue, 14 Sep 2021 21:10:03 +02:00

x86/fpu/signal: Change return type of copy_fpregs_to_sigframe() helpers to boolean

Now that copy_fpregs_to_sigframe() returns boolean the individual return
codes in the related helper functions do not make sense anymore. Change
them to return boolean success/fail.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Link: https://lkml.kernel.org/r/20210908132525.794334915@xxxxxxxxxxxxx
---
arch/x86/kernel/fpu/signal.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c
index 7ce396d..1d10fe9 100644
--- a/arch/x86/kernel/fpu/signal.c
+++ b/arch/x86/kernel/fpu/signal.c
@@ -65,7 +65,7 @@ setfx:
/*
* Signal frame handlers.
*/
-static inline int save_fsave_header(struct task_struct *tsk, void __user *buf)
+static inline bool save_fsave_header(struct task_struct *tsk, void __user *buf)
{
if (use_fxsr()) {
struct xregs_state *xsave = &tsk->thread.fpu.state.xsave;
@@ -82,18 +82,19 @@ static inline int save_fsave_header(struct task_struct *tsk, void __user *buf)
if (__copy_to_user(buf, &env, sizeof(env)) ||
__put_user(xsave->i387.swd, &fp->status) ||
__put_user(X86_FXSR_MAGIC, &fp->magic))
- return -1;
+ return false;
} else {
struct fregs_state __user *fp = buf;
u32 swd;
+
if (__get_user(swd, &fp->swd) || __put_user(swd, &fp->status))
- return -1;
+ return false;
}

- return 0;
+ return true;
}

-static inline int save_xstate_epilog(void __user *buf, int ia32_frame)
+static inline bool save_xstate_epilog(void __user *buf, int ia32_frame)
{
struct xregs_state __user *x = buf;
struct _fpx_sw_bytes *sw_bytes;
@@ -131,7 +132,7 @@ static inline int save_xstate_epilog(void __user *buf, int ia32_frame)

err |= __put_user(xfeatures, (__u32 __user *)&x->header.xfeatures);

- return err;
+ return !err;
}

static inline int copy_fpregs_to_sigframe(struct xregs_state __user *buf)
@@ -218,10 +219,10 @@ retry:
}

/* Save the fsave header for the 32-bit frames. */
- if ((ia32_fxstate || !use_fxsr()) && save_fsave_header(tsk, buf))
+ if ((ia32_fxstate || !use_fxsr()) && !save_fsave_header(tsk, buf))
return false;

- if (use_fxsr() && save_xstate_epilog(buf_fx, ia32_fxstate))
+ if (use_fxsr() && !save_xstate_epilog(buf_fx, ia32_fxstate))
return false;

return true;