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powerpc: Add esr as a synonym for pt_regs.dsisr

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Create an anonymous union for dsisr and esr regsiters, we can reference
esr to get the exception detail when CONFIG_4xx=y or CONFIG_BOOKE=y.
Otherwise, reference dsisr. This makes code more clear.

Signed-off-by: Xiongwei Song <sxwjean@gmail.com>
[mpe: Reword commit title]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210807010239.416055-2-sxwjean@me.com
This commit is contained in:
Xiongwei Song
2021-08-07 09:02:36 +08:00
committed by Michael Ellerman
parent e42edf9b9d
commit 4f8e78c075
6 changed files with 11 additions and 6 deletions
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arch/powerpc/kernel/ptrace/ptrace.c
+2
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@@ -375,6 +375,8 @@ void __init pt_regs_check(void)
offsetof(struct user_pt_regs, dar));
BUILD_BUG_ON(offsetof(struct pt_regs, dsisr) !=
offsetof(struct user_pt_regs, dsisr));
BUILD_BUG_ON(offsetof(struct pt_regs, esr) !=
offsetof(struct user_pt_regs, dsisr));
BUILD_BUG_ON(offsetof(struct pt_regs, result) !=
offsetof(struct user_pt_regs, result));