Commit 76a4efa8 authored by Peter Zijlstra's avatar Peter Zijlstra
Browse files

perf/arch: Remove perf_sample_data::regs_user_copy 



struct perf_sample_data lives on-stack, we should be careful about it's
size. Furthermore, the pt_regs copy in there is only because x86_64 is a
trainwreck, solve it differently.

Reported-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: default avatarSteven Rostedt <rostedt@goodmis.org>
Link: https://lkml.kernel.org/r/20201030151955.258178461@infradead.org
parent 09da9c81

arch/arm/kernel/perf_regs.c

+1 −2
Original line number Diff line number Diff line
@@ -32,8 +32,7 @@ u64 perf_reg_abi(struct task_struct *task) 
}



void perf_get_regs_user(struct perf_regs *regs_user,

			struct pt_regs *regs,

			struct pt_regs *regs_user_copy)

			struct pt_regs *regs)

{

	regs_user->regs = task_pt_regs(current);

	regs_user->abi = perf_reg_abi(current);

arch/arm64/kernel/perf_regs.c

+1 −2
Original line number Diff line number Diff line
@@ -73,8 +73,7 @@ u64 perf_reg_abi(struct task_struct *task) 
}



void perf_get_regs_user(struct perf_regs *regs_user,

			struct pt_regs *regs,

			struct pt_regs *regs_user_copy)

			struct pt_regs *regs)

{

	regs_user->regs = task_pt_regs(current);

	regs_user->abi = perf_reg_abi(current);

arch/csky/kernel/perf_regs.c

+1 −2
Original line number Diff line number Diff line
@@ -32,8 +32,7 @@ u64 perf_reg_abi(struct task_struct *task) 
}



void perf_get_regs_user(struct perf_regs *regs_user,

			struct pt_regs *regs,

			struct pt_regs *regs_user_copy)

			struct pt_regs *regs)

{

	regs_user->regs = task_pt_regs(current);

	regs_user->abi = perf_reg_abi(current);

arch/powerpc/perf/perf_regs.c

+1 −2
Original line number Diff line number Diff line
@@ -144,8 +144,7 @@ u64 perf_reg_abi(struct task_struct *task) 
}



void perf_get_regs_user(struct perf_regs *regs_user,

			struct pt_regs *regs,

			struct pt_regs *regs_user_copy)

			struct pt_regs *regs)

{

	regs_user->regs = task_pt_regs(current);

	regs_user->abi = (regs_user->regs) ? perf_reg_abi(current) :

arch/riscv/kernel/perf_regs.c

+1 −2
Original line number Diff line number Diff line
@@ -36,8 +36,7 @@ u64 perf_reg_abi(struct task_struct *task) 
}



void perf_get_regs_user(struct perf_regs *regs_user,

			struct pt_regs *regs,

			struct pt_regs *regs_user_copy)

			struct pt_regs *regs)

{

	regs_user->regs = task_pt_regs(current);

	regs_user->abi = perf_reg_abi(current);

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