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From: "Philippe Mathieu-Daudé" <philmd@linaro.org>
To: qemu-devel@nongnu.org
Cc: "Laurent Vivier" <laurent@vivier.eu>,
	"Riku Voipio" <riku.voipio@iki.fi>,
	"Kyle Evans" <kevans@freebsd.org>, "Warner Losh" <imp@bsdimp.com>,
	"Philippe Mathieu-Daudé" <philmd@linaro.org>
Subject: [PATCH v3 1/3] bsd-user: Always use mmap_find_vma_aligned() in target_mmap()
Date: Fri,  7 Mar 2025 14:09:49 +0100	[thread overview]
Message-ID: <20250307130951.4816-2-philmd@linaro.org> (raw)
In-Reply-To: <20250307130951.4816-1-philmd@linaro.org>

Massage target_mmap(): calculate alignment once, then
unconditionally call mmap_find_vma_aligned().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 bsd-user/mmap.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/bsd-user/mmap.c b/bsd-user/mmap.c
index 346f2cefd32..28d7e387a20 100644
--- a/bsd-user/mmap.c
+++ b/bsd-user/mmap.c
@@ -489,13 +489,14 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
      * before we truncate the length for mapping files below.
      */
     if (!(flags & MAP_FIXED)) {
+        abi_ulong alignment = 0;
+
         host_len = len + offset - host_offset;
         host_len = HOST_PAGE_ALIGN(host_len);
-        if ((flags & MAP_ALIGNMENT_MASK) != 0)
-            start = mmap_find_vma_aligned(real_start, host_len,
-                (flags & MAP_ALIGNMENT_MASK) >> MAP_ALIGNMENT_SHIFT);
-        else
-            start = mmap_find_vma(real_start, host_len);
+        if ((flags & MAP_ALIGNMENT_MASK) != 0) {
+            alignment = (flags & MAP_ALIGNMENT_MASK) >> MAP_ALIGNMENT_SHIFT;
+        }
+        start = mmap_find_vma_aligned(real_start, host_len, alignment);
         if (start == (abi_ulong)-1) {
             errno = ENOMEM;
             goto fail;
-- 
2.47.1



  reply	other threads:[~2025-03-07 13:11 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-03-07 13:09 [PATCH v3 0/3] user: Extract common MMAP API to 'user/mmap.h' Philippe Mathieu-Daudé
2025-03-07 13:09 ` Philippe Mathieu-Daudé [this message]
2025-03-07 16:03   ` [PATCH v3 1/3] bsd-user: Always use mmap_find_vma_aligned() in target_mmap() Richard Henderson
2025-03-09 23:21   ` Warner Losh
2025-03-07 13:09 ` [PATCH v3 2/3] bsd-user: Propagate alignment argument to mmap_find_vma() Philippe Mathieu-Daudé
2025-03-07 16:08   ` Richard Henderson
2025-03-07 16:17     ` Philippe Mathieu-Daudé
2025-03-09 23:20   ` Warner Losh
2025-03-07 13:09 ` [PATCH v3 3/3] user: Extract common MMAP API to 'user/mmap.h' Philippe Mathieu-Daudé

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