mm: vrealloc: fix missing nommu implementation

Commit 5ec6d992f460 ("mm: vmalloc: implement vrealloc()") introduces
vrealloc(), but lacks the implementation of the nommu version of this
function.

Note that currently nommu isn't actually broken without this.  The only
user, kvrealloc(), never actually calls into vrealloc() with nommu, since
it's guarded by is_vmalloc_addr(), which for nommu always returns false.

However, since this becomes a real issue once vrealloc() is used by other
code, fix this.

Link: https://lkml.kernel.org/r/20240725141227.13954-1-dakr@kernel.org
Fixes: 5ec6d992f460 ("mm: vmalloc: implement vrealloc()")
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/nommu.c b/mm/nommu.c
index 7296e775e04e291700c53d31c0c03295f0c329f7..40cac1348b403a9b42d058df1fc5b4fdf15c29a9 100644 (file)
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -126,6 +126,11 @@ void *__vmalloc_noprof(unsigned long size, gfp_t gfp_mask)
 }
 EXPORT_SYMBOL(__vmalloc_noprof);
 
+void *vrealloc_noprof(const void *p, size_t size, gfp_t flags)
+{
+       return krealloc_noprof(p, size, (flags | __GFP_COMP) & ~__GFP_HIGHMEM);
+}
+
 void *__vmalloc_node_range_noprof(unsigned long size, unsigned long align,
                unsigned long start, unsigned long end, gfp_t gfp_mask,
                pgprot_t prot, unsigned long vm_flags, int node,