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[1/2] powerpc/signal_32: Remove !FULL_REGS() special handling in PPC64 save_general_regs()

Message ID 173de3b659fa3a5f126a0eb170522cccd909950f.1594125164.git.christophe.leroy@csgroup.eu
State Accepted
Commit 667e3c413ecf20371692fd2dc37e06dc14d0b140
Headers show
Series [1/2] powerpc/signal_32: Remove !FULL_REGS() special handling in PPC64 save_general_regs() | expand

Commit Message

Christophe Leroy July 7, 2020, 12:33 p.m. UTC
Since commit ("1bd79336a426 powerpc: Fix various
syscall/signal/swapcontext bugs"), getting save_general_regs() called
without FULL_REGS() is very unlikely and generates a warning.

The 32-bit version of save_general_regs() doesn't take care of it
at all and copies all registers anyway since that commit.

Moreover, commit 965dd3ad3076 ("powerpc/64/syscall: Remove
non-volatile GPR save optimisation") is another reason why it would
never happen.

So the same with 64-bit, don't worry about FULL_REGS() and copy
all registers all the time.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/kernel/signal_32.c | 2 --
 1 file changed, 2 deletions(-)

Comments

Michael Ellerman July 16, 2020, 12:55 p.m. UTC | #1
On Tue, 7 Jul 2020 12:33:35 +0000 (UTC), Christophe Leroy wrote:
> Since commit ("1bd79336a426 powerpc: Fix various
> syscall/signal/swapcontext bugs"), getting save_general_regs() called
> without FULL_REGS() is very unlikely and generates a warning.
> 
> The 32-bit version of save_general_regs() doesn't take care of it
> at all and copies all registers anyway since that commit.
> 
> [...]

Applied to powerpc/next.

[1/2] powerpc/signal_32: Remove !FULL_REGS() special handling in PPC64 save_general_regs()
      https://git.kernel.org/powerpc/c/667e3c413ecf20371692fd2dc37e06dc14d0b140
[2/2] powerpc/signal_32: Simplify loop in PPC64 save_general_regs()
      https://git.kernel.org/powerpc/c/020c4831e01264f8b62af6ca9e669b7c51881a56

cheers
diff mbox series

Patch

diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 1415c16ab628..0fd59fbc6d49 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -109,8 +109,6 @@  static inline int save_general_regs(struct pt_regs *regs,
 	WARN_ON(!FULL_REGS(regs));
 
 	for (i = 0; i <= PT_RESULT; i ++) {
-		if (i == 14 && !FULL_REGS(regs))
-			i = 32;
 		if ( i == PT_SOFTE) {
 			if(__put_user((unsigned int)softe, &frame->mc_gregs[i]))
 				return -EFAULT;