diff options
| author | Zeng Chi <zengchi@kylinos.cn> | 2026-09-21 18:24:42 +0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-09-22 08:36:16 -0700 |
| commit | 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d (patch) | |
| tree | 660d50d4139cb750fbde1ae3432452c20726c99d /arch/alpha/lib/strcpy.S | |
| download | linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.tar.gz linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.zip | |
KVM: Don't pre-reserve xarray entries when storing empty/NULL attributesgrafted
Skip the xarray reservation loop when clearing all memory attributes, as
storing NULL only erases the entry and never needs to allocate, so no
reservation (and no cleanup of a failed one) is required in that case.
Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/alpha/lib/strcpy.S')
| -rw-r--r-- | arch/alpha/lib/strcpy.S | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/alpha/lib/strcpy.S b/arch/alpha/lib/strcpy.S new file mode 100644 index 000000000..d8773ba77 --- /dev/null +++ b/arch/alpha/lib/strcpy.S @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * arch/alpha/lib/strcpy.S + * Contributed by Richard Henderson (rth@tamu.edu) + * + * Copy a null-terminated string from SRC to DST. Return a pointer + * to the null-terminator in the source. + */ +#include <linux/export.h> + .text + + .align 3 + .globl strcpy + .ent strcpy +strcpy: + .frame $30, 0, $26 + .prologue 0 + + mov $16, $0 # set up return value + mov $26, $23 # set up return address + unop + br __stxcpy # do the copy + + .end strcpy + EXPORT_SYMBOL(strcpy) |