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Thunderbird Subject: Re: [PATCH] parisc/entry: set W bit for !compat tasks in syscall_restore_rfi() To: Sven Schnelle , John David Anglin Cc: linux-parisc@vger.kernel.org, linux-kernel@vger.kernel.org References: <20251015212141.289981-1-svens@stackframe.org> Content-Language: en-US From: Helge Deller Autocrypt: addr=deller@gmx.de; keydata= xsFNBF3Ia3MBEAD3nmWzMgQByYAWnb9cNqspnkb2GLVKzhoH2QD4eRpyDLA/3smlClbeKkWT HLnjgkbPFDmcmCz5V0Wv1mKYRClAHPCIBIJgyICqqUZo2qGmKstUx3pFAiztlXBANpRECgwJ r+8w6mkccOM9GhoPU0vMaD/UVJcJQzvrxVHO8EHS36aUkjKd6cOpdVbCt3qx8cEhCmaFEO6u CL+k5AZQoABbFQEBocZE1/lSYzaHkcHrjn4cQjc3CffXnUVYwlo8EYOtAHgMDC39s9a7S90L 69l6G73lYBD/Br5lnDPlG6dKfGFZZpQ1h8/x+Qz366Ojfq9MuuRJg7ZQpe6foiOtqwKym/zV dVvSdOOc5sHSpfwu5+BVAAyBd6hw4NddlAQUjHSRs3zJ9OfrEx2d3mIfXZ7+pMhZ7qX0Axlq Lq+B5cfLpzkPAgKn11tfXFxP+hcPHIts0bnDz4EEp+HraW+oRCH2m57Y9zhcJTOJaLw4YpTY GRUlF076vZ2Hz/xMEvIJddRGId7UXZgH9a32NDf+BUjWEZvFt1wFSW1r7zb7oGCwZMy2LI/G aHQv/N0NeFMd28z+deyxd0k1CGefHJuJcOJDVtcE1rGQ43aDhWSpXvXKDj42vFD2We6uIo9D 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6thTOfads/XaC2xZ8CLAgCY128HeZsNU3CHtinvUp6OUnkqpdzA6/SR0XdheKu8/3Q72fjc/+ DTFvsUEIh4n57DGfFlz+mNgIpGNrj6zA9HMtQaAmusr9HP84MpAfL1Fihlg8ZcP/b+QNE2wG+ TYRRmQEfdHAY8OfqgrZzdhMV6x5ndJRy2KsVKfFNKwaYScrUjUFCG8RE6H2EdBgEhWRZgo5yP Ros79v8TxTWIkfmFwqMrsLfxft5k5FNYvLZEv+d3uNo7GR0tNYswIJrVXT8SeEvIHmr+DnIS1 TzfuY65uAFHIbi68ic8YIwcJHujaGf0cAKCWsXrty1RKJl0WrObGW4og On 10/15/25 23:21, Sven Schnelle wrote: > When the kernel leaves to userspace via syscall_restore_rfi(), the > W bit is not set in the new PSW. This doesn't cause any problems > because there's no 64 bit userspace for parisc. Simple static binaries > are usually loaded at addresses way below the 32 bit limit so the W bit > doesn't matter. >=20 > Fix this by setting the W bit when TIF_32BIT is not set. >=20 > Signed-off-by: Sven Schnelle > --- > arch/parisc/kernel/asm-offsets.c | 2 ++ > arch/parisc/kernel/entry.S | 5 ++++- > 2 files changed, 6 insertions(+), 1 deletion(-) applied. Thanks! Helge